diff --git a/README.md b/README.md
index efaa332b..fc5579f6 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
 # 🧩 NeoDB
-_mark the things you love._
+_mark the things you love_
 
 ![](https://github.com/neodb-social/neodb/actions/workflows/check.yml/badge.svg?branch=main)
 ![](https://github.com/neodb-social/neodb/actions/workflows/tests.yml/badge.svg?branch=main)
diff --git a/boofilsic/settings.py b/boofilsic/settings.py
index 23a73e58..4b051871 100644
--- a/boofilsic/settings.py
+++ b/boofilsic/settings.py
@@ -41,6 +41,8 @@ env = environ.FileAwareEnv(
     ),
     # Links in site footer
     NEODB_SITE_LINKS=(dict, {}),
+    # Alternative domains
+    NEODB_ALTERNATIVE_DOMAINS=(list, []),
     # Default language
     NEODB_LANGUAGE=(str, "zh-hans"),
     # Invite only mode
@@ -200,12 +202,9 @@ ALLOW_EMAIL_ONLY_ACCOUNT = env.bool(
 # Allow user to login via any Mastodon/Pleroma sites
 MASTODON_ALLOW_ANY_SITE = len(MASTODON_ALLOWED_SITES) == 0
 
-REDIRECT_URIS = env(
-    "NEODB_LOGIN_MASTODON_REDIRECT_URI",
-    default=SITE_INFO["site_url"] + "/account/login/oauth",
-)
-# for sites migrated from previous version, either wipe mastodon client ids or use:
-# REDIRECT_URIS = f'{SITE_INFO["site_url"]}/users/OAuth2_login/'
+ALTERNATIVE_DOMAINS = env("NEODB_ALTERNATIVE_DOMAINS", default=[])  # type: ignore
+
+SITE_DOMAINS = [SITE_DOMAIN] + ALTERNATIVE_DOMAINS
 
 ENABLE_LOCAL_ONLY = env("NEODB_ENABLE_LOCAL_ONLY")
 
diff --git a/catalog/search/views.py b/catalog/search/views.py
index b98b94eb..b9d95404 100644
--- a/catalog/search/views.py
+++ b/catalog/search/views.py
@@ -126,7 +126,7 @@ def search(request):
 
     if keywords.find("://") > 0:
         host = keywords.split("://")[1].split("/")[0]
-        if host == settings.SITE_INFO["site_domain"]:
+        if host in settings.SITE_DOMAINS:
             return redirect(keywords)
         site = SiteManager.get_site_by_url(keywords)
         if site:
diff --git a/catalog/sites/fedi.py b/catalog/sites/fedi.py
index 95a47ba1..55f222b6 100644
--- a/catalog/sites/fedi.py
+++ b/catalog/sites/fedi.py
@@ -51,10 +51,7 @@ class FediverseInstance(AbstractSite):
         val = URLValidator()
         try:
             val(url)
-            if (
-                url.split("://", 1)[1].split("/", 1)[0].lower()
-                == settings.SITE_INFO["site_domain"]
-            ):
+            if url.split("://", 1)[1].split("/", 1)[0].lower() in settings.SITE_DOMAINS:
                 # disallow local instance URLs
                 return False
             return cls.get_json_from_url(url) is not None
diff --git a/catalog/templates/_item_card.html b/catalog/templates/_item_card.html
index 2e24c059..3d35e244 100644
--- a/catalog/templates/_item_card.html
+++ b/catalog/templates/_item_card.html
@@ -23,7 +23,7 @@
   <div class="item">
     <div class="cover">
       <a href="{{ item.url }}">
-        <img src="{{ item.cover_image_url }}" alt="cover" />
+        <img src="{{ item.cover_image_url|relative_uri }}" alt="cover" />
       </a>
     </div>
     <div>
diff --git a/catalog/templates/item_base.html b/catalog/templates/item_base.html
index 7146fe9e..ac11a861 100644
--- a/catalog/templates/item_base.html
+++ b/catalog/templates/item_base.html
@@ -18,7 +18,7 @@
     <meta property="og:title"
           content="{{ site_name }}{% trans item.category.label %} - {{ item.display_title }}">
     <meta property="og:type" content="{{ item.category }}">
-    <meta property="og:url" content="{{ request.build_absolute_uri }}">
+    <meta property="og:url" content="{{ item.absolute_url }}">
     {% if item.has_cover %}<meta property="og:image" content="{{ item.cover_image_url }}">{% endif %}
     <meta property="og:site_name" content="{{ site_name }}">
     <meta property="og:description" content="{{ item.brief }}">
@@ -48,7 +48,7 @@
         </span>
       </div>
       <div id="item-cover" class="left">
-        <img src="{{ item.cover_image_url|default:item.cover.url }}"
+        <img src="{{ item.cover_image_url|default:item.cover.url|relative_uri }}"
              alt="{{ item.title }}">
       </div>
       {% if request.user.is_authenticated and not mark.shelf_type %}
diff --git a/catalog/templates/podcastepisode.html b/catalog/templates/podcastepisode.html
index efe6a894..ebf6a3fa 100644
--- a/catalog/templates/podcastepisode.html
+++ b/catalog/templates/podcastepisode.html
@@ -15,9 +15,9 @@
           content="0;url={{ item.parent_item.url }}?focus={{ item.uuid }}{% if request.GET.position %}&position={{ request.GET.position }}{% endif %}" />
   {% endif %}
   <meta property="og:image"
-        content="{{ item.cover_url | default:item.program.cover_image_url }}">
+        content="{{ item.cover_url|default:item.program.cover_image_url }}">
   <meta property="twitter:image"
-        content="{{ item.cover_url | default:item.program.cover_image_url }}">
+        content="{{ item.cover_url|default:item.program.cover_image_url }}">
   {% if item.media_url and item.parent_item %}
     <meta property="twitter:card" content="player">
     <meta property="twitter:player"
diff --git a/common/templates/_footer.html b/common/templates/_footer.html
index 383630ae..0a4404df 100644
--- a/common/templates/_footer.html
+++ b/common/templates/_footer.html
@@ -15,6 +15,9 @@
        rel="noopener"
        href="https://github.com/neodb-social">源代码</a>
   </div>
+  <div class="hide_unless_alter_domain" style="padding-top: 1em;">
+    这是{{ site_name }}的临时镜像，请尽可能使用<a href="{{ site_url }}{{ request.get_full_path }}">原始站点</a>。
+  </div>
 </footer>
 <div class="player"></div>
 <script>
diff --git a/common/templates/_sidebar.html b/common/templates/_sidebar.html
index c671108c..89bbb8f0 100644
--- a/common/templates/_sidebar.html
+++ b/common/templates/_sidebar.html
@@ -7,6 +7,7 @@
 {% load thumb %}
 {% load collection %}
 {% load bleach_tags %}
+{% load duration %}
 <aside class="grid__aside sidebar">
   {% if request.user.unread_announcements %}
     <section class="announcement">
@@ -40,7 +41,7 @@
               <div class="avatar">
                 <a href="{{ identity.url }}" onclick="window.location = this.href;">
                   {% comment %} onclick to workaround webkit issue with <a />  in <summary /> {% endcomment %}
-                  <img src="{{ identity.avatar }}" alt="">
+                  <img src="{{ identity.avatar|relative_uri }}" alt="">
                 </a>
               </div>
               <div>
@@ -127,7 +128,7 @@
                      data-position="0"
                      href="{{ item.url }}"
                      title="{{ item.title }}">
-                    <img src="{{ item.cover_image_url | default:item.cover.url }}"
+                    <img src="{{ item.cover_image_url|default:item.cover.url|relative_uri }}"
                          alt="{{ item.title }}"
                          loading="lazy">
                     <div class="card-title">
diff --git a/common/templates/common_libs.html b/common/templates/common_libs.html
index 5f78918e..750cbe43 100644
--- a/common/templates/common_libs.html
+++ b/common/templates/common_libs.html
@@ -51,4 +51,9 @@
 <link rel="apple-touch-icon" href="{{ site_logo }}">
 <meta name="apple-mobile-web-app-capable" content="yes">
 <meta name="apple-mobile-web-app-title" content="{{ site_name }}">
+{% if request.META.HTTP_HOST == site_domain %}
+  <style type="text/css">.hide_unless_alter_domain{display:none;}</style>
+{% else %}
+  <meta name="robots" content="noindex">
+{% endif %}
 {{ site_head|safe }}
diff --git a/common/templatetags/duration.py b/common/templatetags/duration.py
index 912bfb03..e621959d 100644
--- a/common/templatetags/duration.py
+++ b/common/templatetags/duration.py
@@ -54,6 +54,12 @@ def rating_star(value):
     return mark_safe(html)
 
 
+@register.filter()
+@stringfilter
+def relative_uri(value: str) -> str:
+    return str(value).replace(settings.SITE_INFO["site_url"], "")
+
+
 @register.filter
 def make_range(number):
     return range(1, number + 1)
diff --git a/compose.yml b/compose.yml
index 9a571408..b47551b6 100644
--- a/compose.yml
+++ b/compose.yml
@@ -26,6 +26,8 @@ x-shared:
       NEODB_USER_ICON:
       NEODB_SITE_LINKS:
       NEODB_SITE_DESCRIPTION:
+      NEODB_ALTERNATIVE_DOMAINS:
+      NEODB_LANGUAGE:
       NEODB_ADMIN_USERNAMES:
       NEODB_INVITE_ONLY:
       NEODB_LOGIN_ENABLE_EMAIL_ONLY:
diff --git a/doc/configuration.md b/doc/configuration.md
index 6ab2cfc4..8500291c 100644
--- a/doc/configuration.md
+++ b/doc/configuration.md
@@ -8,7 +8,6 @@ most settings resides in `settings.py`, a few notable ones:
 
  - `SECRET_KEY` must use your own, back it up well somewhere
  - `SITE_INFO` change by you need
- - `REDIRECT_URIS` this should be `SITE_INFO["site_url"] + "/account/login/oauth"` . It used to be multiple urls separated by `\n` , but now it must be only one url, bc not all Fediverse software support >1 urls very well. Also note changing this later may invalidate app token granted previously
  - `MASTODON_ALLOW_ANY_SITE` set to `True` so that user can login via any Mastodon API compatible sites (e.g. Mastodon/Pleroma)
  - `MASTODON_CLIENT_SCOPE` change it later may invalidate app token granted previously
  - `ADMIN_URL` admin page url, keep it private
@@ -20,3 +19,19 @@ Settings for Scrapers
 ---------------------
 
 TBA
+
+
+Other maintenance tasks
+-----------------------
+
+Add alias to your shell for easier access
+
+```
+alias neodb-manage='docker-compose --profile production run shell neodb-manage'
+```
+
+Enable Developer Console
+
+```
+neodb-manage createapplication --client-id NEODB_DEVELOPER_CONSOLE --skip-authorization --name 'NeoDB Developer Console' --redirect-uris 'https://example.org/lol'  confidential authorization-code
+```
diff --git a/doc/install.md b/doc/install.md
index 497df552..9332a661 100644
--- a/doc/install.md
+++ b/doc/install.md
@@ -1,156 +1,6 @@
 NiceDB / NeoDB - Getting Start
 ==============================
-This is a very basic guide with limited detail, contributions welcomed
 
-## Table of Contents
-- [Run in Docker](#0-run-in-docker)
-- [1 Install](#1-manual-install)
-  * [1.1 Database](#11-database)
-  * [1.2 Configuration](#12-configuration)
-  * [1.3 Packages and Build](#13-packages-and-build)
-- [2 Start services](#2-start-services)
-- [3 Migrate from an earlier version](#3-migrate-from-an-earlier-version)
-- [4 Add Cron Jobs (optional)](#4-add-cron-jobs-optional)
-- [5 Index and Search (optional)](#5-index-and-search-optional)
-- [6 Other maintenance tasks (optional)](#6-other-maintenance-tasks-optional)
-- [7 Frequently Asked Questions](#7-frequently-asked-questions)
+see [Docker Installation](install-docker.md)
 
-
-
-0 Run in Docker
----------------
-
-Recommended, see [Docker Installation](install-docker.md)
-
-*Manual installation are no longer recommended and the doc below may be outdated*
-
-1 Manual Install
-----------------
-Install PostgreSQL, Redis and Python (3.10 or above) if not yet
-
-### 1.1 Database
-Setup database
-```
-CREATE ROLE neodb with LOGIN ENCRYPTED PASSWORD 'abadface';
-CREATE DATABASE neodb ENCODING 'UTF8' LC_COLLATE='en_US.UTF-8' LC_CTYPE='en_US.UTF-8' TEMPLATE template0;
-GRANT ALL ON DATABASE neodb TO neodb;
-```
-
-### 1.2 Configuration
-Create and edit your own configuration file (optional but very much recommended)
-```
-mkdir mysite && cp boofilsic/settings.py mysite/
-export DJANGO_SETTINGS_MODULE=mysite.settings
-```
-Alternatively you can have a configuration file import `boofilsic/settings.py` then override it:
-```
-from boofilsic.settings import *
-
-SECRET_KEY = "my_key"
-```
-
-The most important configurations to setup are:
-
-- `MASTODON_ALLOW_ANY_SITE` set to `True` so that user can login via any Mastodon API compatible sites (e.g. Mastodon/Pleroma)
-- `REDIRECT_URIS` should be `SITE_INFO["site_url"] + "/account/login/oauth"`. If you want to run **on local**, `SITE_INFO["site_url"]` should be set to `"http://localhost/"`
-
-More details on `settings.py` in [configuration.md](configuration.md)
-
-### 1.3 Packages and Build
-Create and use `venv` as you normally would, then install packages
-```
-python3 -m pip install -r requirements.txt
-
-```
-
-Quick check
-```
-python3 manage.py check
-```
-
-Initialize database
-```
-python3 manage.py migrate
-```
-
-Build static assets (production only)
-```
-python3 manage.py compilescss
-python3 manage.py collectstatic
-```
-
-
-2 Start services
---------------
-Make sure PostgreSQL and Redis are running
-
-Start job queue server
-```
-export OBJC_DISABLE_INITIALIZE_FORK_SAFETY=YES  # required and only for macOS, otherwise it may crash
-python3 manage.py rqworker --with-scheduler import export mastodon fetch crawl
-```
-
-Run web server in dev mode
-```
-python3 manage.py runserver
-```
-
-It should be ready to serve from here, to run web server for production, consider `gunicorn -w 8 boofilsic.wsgi` in systemd or sth similar
-
-
-3 Migrate from an earlier version
--------------------------------
-Update database
-```
-python3 manage.py migrate
-```
-
-Rebuild static assets
-```
-python3 manage.py compilescss
-python3 manage.py collectstatic
-```
-
-4 Add Cron Jobs (optional)
--------------
-add `python manage.py refresh_mastodon` to crontab to run hourly, it will refresh cached users' follow/mute/block from mastodon
-
-5 Index and Search (optional)
-----------------
-Install TypeSense or Meilisearch, change `SEARCH_BACKEND` and coniguration for search server in `settings.py`
-
-Build initial index, it may take a few minutes or hours
-```
-python3 manage.py index --init
-python3 manage.py index --reindex
-```
-
-6 Other maintenance tasks (optional)
------------------------
-Requeue failed import jobs
-```
-rq requeue --all --queue import
-```
-
-Run Tests
-```
-coverage run --source='.' manage.py test
-coverage report
-```
-
-Enable Developer Console
-```
-python3 manage.py createapplication --client-id NEODB_DEVELOPER_CONSOLE --skip-authorization --name 'NeoDB Developer Console' --redirect-uris 'https://example.org/lol'  confidential authorization-code
-```
-
-7 Frequently Asked Questions
-------
-
-### I got Error: “无效的登录回调地址”.
-
-Check `REDIRECT_URIS` in `settings.py`, the final value should be `"http://localhost/account/login/oauth"` or sth similar. If you are specifying a port, add the port to the localhost address.
-
-If any change was made to `REDIRECT_URIS`, existing apps registered in Mastodon are no longer valid, so delete the app record in the database:
-```
-delete from mastodon_mastodonapplication;
-```
+*Manual installation are no longer supported*
diff --git a/mastodon/api.py b/mastodon/api.py
index c62541e7..383bdf5b 100644
--- a/mastodon/api.py
+++ b/mastodon/api.py
@@ -8,6 +8,7 @@ from urllib.parse import quote
 import django_rq
 import requests
 from django.conf import settings
+from django.urls import reverse
 from django.utils.translation import gettext_lazy as _
 from loguru import logger
 
@@ -226,29 +227,22 @@ def post_toot(
     return response
 
 
-def create_app(domain_name):
-    # naive protocal strip
-    is_http = False
-    if domain_name.startswith("https://"):
-        domain_name = domain_name.replace("https://", "")
-    elif domain_name.startswith("http://"):
-        is_http = True
-        domain_name = domain_name.replace("http://", "")
-    if domain_name.endswith("/"):
-        domain_name = domain_name[0:-1]
+def _get_redirect_uris(allow_multiple=True) -> str:
+    u = settings.SITE_INFO["site_url"] + "/account/login/oauth"
+    if not allow_multiple:
+        return u
+    u2s = [f"https://{d}/account/login/oauth" for d in settings.ALTERNATIVE_DOMAINS]
+    return "\n".join([u] + u2s)
 
-    if not is_http:
-        url = "https://" + domain_name + API_CREATE_APP
-    else:
-        url = "http://" + domain_name + API_CREATE_APP
 
+def create_app(domain_name, allow_multiple_redir):
+    url = "https://" + domain_name + API_CREATE_APP
     payload = {
         "client_name": settings.SITE_INFO["site_name"],
         "scopes": settings.MASTODON_CLIENT_SCOPE,
-        "redirect_uris": settings.REDIRECT_URIS,
+        "redirect_uris": _get_redirect_uris(allow_multiple_redir),
         "website": settings.SITE_INFO["site_url"],
     }
-
     response = post(url, data=payload, headers={"User-Agent": USER_AGENT})
     return response
 
@@ -368,12 +362,12 @@ def get_or_create_fediverse_application(login_domain):
     if not settings.MASTODON_ALLOW_ANY_SITE:
         logger.warning(f"Disallowed to create app for {domain}")
         raise Exception("不支持其它实例登录")
-    if settings.SITE_DOMAIN.lower() == login_domain.lower():
+    if login_domain.lower() in settings.SITE_DOMAINS:
         raise ValueError("必须使用其它实例登录")
     domain, api_domain, server_version = detect_server_info(login_domain)
     if (
-        settings.SITE_DOMAIN.lower() == domain.lower()
-        or settings.SITE_DOMAIN.lower() == api_domain.lower()
+        domain.lower() in settings.SITE_DOMAINS
+        or api_domain.lower() in settings.SITE_DOMAINS
     ):
         raise ValueError("必须使用其它实例登录")
     if "neodb/" in server_version:
@@ -382,7 +376,8 @@ def get_or_create_fediverse_application(login_domain):
         app = MastodonApplication.objects.filter(domain_name__iexact=domain).first()
         if app:
             return app
-    response = create_app(api_domain)
+    allow_multiple_redir = True  # TODO detect site supports multiple redirect uris
+    response = create_app(api_domain, allow_multiple_redir)
     if response.status_code != 200:
         logger.error(
             f"Error creating app for {domain} on {api_domain}: {response.status_code}"
@@ -406,7 +401,7 @@ def get_or_create_fediverse_application(login_domain):
 
 
 def get_mastodon_login_url(app, login_domain, request):
-    url = settings.REDIRECT_URIS
+    url = request.build_absolute_uri(reverse("users:login_oauth"))
     version = app.server_version or ""
     scope = (
         settings.MASTODON_LEGACY_CLIENT_SCOPE
@@ -429,7 +424,7 @@ def get_mastodon_login_url(app, login_domain, request):
 def obtain_token(site, request, code):
     """Returns token if success else None."""
     mast_app = MastodonApplication.objects.get(domain_name=site)
-    redirect_uri = settings.REDIRECT_URIS
+    redirect_uri = request.build_absolute_uri(reverse("users:login_oauth"))
     payload = {
         "client_id": mast_app.client_id,
         "client_secret": mast_app.client_secret,
diff --git a/users/templates/users/login.html b/users/templates/users/login.html
index 91c7fdc5..661f7f1f 100644
--- a/users/templates/users/login.html
+++ b/users/templates/users/login.html
@@ -147,14 +147,18 @@
                 {% endif %}
               </small>
             {% endif %}
+            <small id="fedi-tips">如不便或尚未<a href="https://joinmastodon.org/zh/servers" target="_blank">注册联邦宇宙</a>，也可以在上方选择「电子邮件验证」注册登录本站。</small>
+            <small id="email-tips" style="display:none;">现有用户通过联邦宇宙登录后关联电子邮件地址，即可通过邮件登录本站；如不便使用联邦宇宙，也可在此输入邮件地址注册账号，未来再关联到联邦宇宙。</small>
           </form>
         {% endif %}
+        <small class="hide_unless_alter_domain">
+          <br>
+          这是{{ site_name }}的临时镜像，请尽可能使用<a href="{{ site_url }}{{ request.get_full_path }}">原始站点</a>。
+        </small>
         <div class="delayed">部分模块加载超时，请检查网络（翻墙）设置。</div>
       </div>
     </article>
     <footer>
-      <small id="fedi-tips">如尚未<a href="https://joinmastodon.org/zh/servers" target="_blank">注册联邦宇宙</a>，也可点选「电子邮件验证」注册登录本站。</small>
-      <small id="email-tips" style="display:none;">现有用户通过联邦宇宙登录后关联电子邮件地址，即可通过邮件登录本站；如不便使用联邦宇宙，也可在此输入邮件地址注册账号，未来再关联到联邦宇宙。</small>
       <br>
       <small>继续访问或注册视为同意本站<a href="{% url 'management:retrieve_slug' 'data-policy' %}">数据方针</a>及使用cookie提供必要功能</small>
     </footer>