diff --git a/.gitignore b/.gitignore
index a6280f981..9e8c5f7ec 100644
--- a/.gitignore
+++ b/.gitignore
@@ -17,3 +17,4 @@ image/discourse_dev/postgres.template.yml
 image/discourse_dev/redis.template.yml
 .gc-state/*
 .vagrant/
+.secrets
diff --git a/generate-config b/generate-config
new file mode 100755
index 000000000..b75292878
--- /dev/null
+++ b/generate-config
@@ -0,0 +1,14 @@
+#!/bin/bash
+
+CONF="containers/discoursed.yml"
+if [ -e "$CONF" ]; then
+  echo "configuration file already exists; refusing to overwrite."
+  exit 1
+fi
+
+cp samples/acm2021.yml "$CONF"
+while cat "$CONF" | grep "__SECRET__" > /dev/null; do
+  ITEM="$(cat "$CONF" | grep "__SECRET__" | head -1 | awk '{ print $1 }' | awk -F: '{ print $1 }')"
+  SECRET="$(cat .secrets | grep "$ITEM" | awk '{ print $2 }')"
+  sed -i "0,/__SECRET__/s//$SECRET/" "$CONF"
+done
diff --git a/misc/all.css b/misc/all.css
new file mode 100644
index 000000000..42c776f03
--- /dev/null
+++ b/misc/all.css
@@ -0,0 +1,2 @@
+.restricted > svg { display: none; }
+.alert-too-few-topics { display: none; }
diff --git a/misc/desktop.html b/misc/desktop.html
new file mode 100644
index 000000000..6c8e704f3
--- /dev/null
+++ b/misc/desktop.html
@@ -0,0 +1,45 @@
+<script>
+var re = /\/c\/course\/programming\/10/i
+setInterval(function () {
+  var $ = function (sel) { return document.querySelector(sel) }
+  if (re.test(location.pathname)) setTimeout(function () {
+    if ($('#create-pm')) return
+    var cT = $('#create-topic')
+    if (cT) {
+      var wrapper = document.createElement('div')
+      wrapper.innerHTML = '<button id="create-pm" class="btn-default btn btn-icon-text ember-view" type="button"><svg class="fa d-icon d-icon-plus svg-icon svg-string" xmlns="http://www.w3.org/2000/svg"><use xlink:href="#plus"></use></svg><span class="d-button-label">新建答疑帖</span></button>'
+      cT.parentElement.insertBefore(wrapper, cT)
+      $('#create-pm').onclick = function () {
+        require('discourse/mixins/open-composer').default.mixins[0].properties.openComposerWithMessageParams.call(
+          { controllerFor: function () { return Discourse.__container__.lookup('controller:composer') } },
+          { recipients: 'Programming-TAs', hasGroups: true },
+        )
+      }
+    }
+  }, 100)
+  if (!Discourse.currentUser.groups.some(function (x) { return x.name === 'Programming-TAs' })) return
+  if ($('#ta-convert-public')) return
+  var aRP = $('.add-remove-participant-btn')
+  if (aRP) {
+    var wrapper = document.createElement('div')
+    wrapper.innerHTML = '<button id="ta-convert-public" class="btn-default btn btn-icon-text ember-view" type="button"><span class="d-button-label">设为公开话题</span></button>'
+    aRP.parentElement.insertBefore(wrapper, aRP)
+    $('#ta-convert-public').onclick = function () {
+      $('#ta-convert-public').disabled = true
+      var id = $('h1[data-topic-id]').getAttribute('data-topic-id')
+      fetch('/t/' + id + '/convert-topic/public', {
+        credentials: "include",
+        headers: {
+          'X-CSRF-Token': require('discourse/models/session').default.current().csrfToken,
+          "Content-Type": "application/x-www-form-urlencoded; charset=UTF-8",
+          "Discourse-Logged-In": "true",
+          "Discourse-Present": "true",
+          'X-Requested-With': 'XMLHttpRequest',
+        },
+        "body": "category_id=10",
+        "method": "PUT",
+      }).then(() => location.reload())
+    }
+  }
+}, 500)
+</script>
diff --git a/misc/mobile.html b/misc/mobile.html
new file mode 100644
index 000000000..7d9bdad94
--- /dev/null
+++ b/misc/mobile.html
@@ -0,0 +1,23 @@
+<script>
+var re = /\/c\/course\/programming\/10/i
+
+api.modifyClass("component:discovery-topics-list", {
+  didInsertElement() {
+    if (re.test(location.pathname)) setTimeout(function () {
+      var $ = function (sel) { return document.querySelector(sel) }
+      var cT = $('#create-topic')
+      if (cT) {
+        var wrapper = document.createElement('div')
+        wrapper.innerHTML = '<button id="create-pm" class="btn-default btn btn-icon-text ember-view" type="button"><svg class="fa d-icon d-icon-plus svg-icon svg-string" xmlns="http://www.w3.org/2000/svg"><use xlink:href="#plus"></use></svg><span class="d-button-label">新建答疑帖</span></button>'
+        cT.parentElement.insertBefore(wrapper, cT)
+        $('#create-pm').onclick = function () {
+          require('discourse/mixins/open-composer').default.mixins[0].properties.openComposerWithMessageParams.call(
+            { controllerFor: function () { return Discourse.__container__.lookup('controller:composer') } },
+            { recipients: 'Programming-TAs', hasGroups: true },
+          )
+        }
+      }
+    }, 100)
+  }
+});
+</script>
diff --git a/sample.secrets b/sample.secrets
new file mode 100644
index 000000000..ba4c2c16c
--- /dev/null
+++ b/sample.secrets
@@ -0,0 +1,4 @@
+DISCOURSE_S3_ACCESS_KEY_ID: xxx
+DISCOURSE_S3_SECRET_ACCESS_KEY: xxx
+DISCOURSE_SMTP_PASSWORD: xxx
+DISCOURSE_MAXMIND_LICENSE_KEY: xxx
diff --git a/samples/acm2021.yml b/samples/acm2021.yml
new file mode 100644
index 000000000..774bc4ac4
--- /dev/null
+++ b/samples/acm2021.yml
@@ -0,0 +1,139 @@
+templates:
+  - "templates/postgres.template.yml"
+  - "templates/redis.template.yml"
+  - "templates/web.template.yml"
+  - "templates/web.ratelimited.template.yml"
+## Uncomment these two lines if you wish to add Lets Encrypt (https)
+#  - "templates/web.ssl.template.yml"
+#  - "templates/web.letsencrypt.ssl.template.yml"
+
+expose:
+  - "20081:80"   # http
+# - "20443:443"  # https
+
+params:
+  db_default_text_search_config: "pg_catalog.english"
+
+  ## Set db_shared_buffers to a max of 25% of the total memory.
+  ## will be set automatically by bootstrap based on detected RAM, or you can override
+  db_shared_buffers: "256MB"
+
+  ## can improve sorting performance, but adds memory usage per-connection
+  #db_work_mem: "40MB"
+
+  ## Which Git revision should this container use? (default: tests-passed)
+  #version: tests-passed
+
+env:
+  LC_ALL: en_US.UTF-8
+  LANG: en_US.UTF-8
+  LANGUAGE: en_US.UTF-8
+  DISCOURSE_DEFAULT_LOCALE: zh_CN
+
+  DISCOURSE_USE_S3: true
+  DISCOURSE_S3_REGION: r19260817
+  DISCOURSE_S3_ENDPOINT: https://oss-cn-shanghai.aliyuncs.com
+  DISCOURSE_S3_ACCESS_KEY_ID: __SECRET__
+  DISCOURSE_S3_SECRET_ACCESS_KEY: __SECRET__
+  DISCOURSE_S3_CDN_URL: //acm2021-production.oss-cn-shanghai.aliyuncs.com
+  DISCOURSE_S3_BUCKET: acm2021-production
+  DISCOURSE_S3_BACKUP_BUCKET: acm2021-backups
+  DISCOURSE_BACKUP_LOCATION: s3
+
+  ## How many concurrent web requests are supported? Depends on memory and CPU cores.
+  ## will be set automatically by bootstrap based on detected CPUs, or you can override
+  UNICORN_WORKERS: 1
+
+  ## TODO: The domain name this Discourse instance will respond to
+  ## Required. Discourse will not work with a bare IP number.
+  DISCOURSE_HOSTNAME: acm.sjtu.app
+
+  ## Uncomment if you want the container to be started with the same
+  ## hostname (-h option) as specified above (default "$hostname-$config")
+  #DOCKER_USE_HOSTNAME: true
+
+  ## TODO: List of comma delimited emails that will be made admin and developer
+  ## on initial signup example 'user1@example.com,user2@example.com'
+  DISCOURSE_DEVELOPER_EMAILS: 'acm-discourse@outlook.com'
+
+  ## TODO: The SMTP mail server used to validate new accounts and send notifications
+  # SMTP ADDRESS, username, and password are required
+  # WARNING the char '#' in SMTP password can cause problems!
+  DISCOURSE_SMTP_ADDRESS: smtp-mail.outlook.com
+  DISCOURSE_SMTP_PORT: 587
+  DISCOURSE_SMTP_USER_NAME: acm-discourse@outlook.com
+  DISCOURSE_SMTP_PASSWORD: __SECRET__
+  DISCOURSE_SMTP_ENABLE_START_TLS: true           # (optional, default true)
+  DISCOURSE_SMTP_DOMAIN: outlook.com
+  DISCOURSE_SMTP_AUTHENTICATION: login
+  DISCOURSE_NOTIFICATION_EMAIL: acm-discourse@outlook.com
+
+  ## If you added the Lets Encrypt template, uncomment below to get a free SSL certificate
+  # LETSENCRYPT_ACCOUNT_EMAIL: me@example.com
+
+  ## The http or https CDN address for this Discourse instance (configured to pull)
+  ## see https://meta.discourse.org/t/14857 for details
+  #DISCOURSE_CDN_URL: https://discourse-cdn.example.com
+  
+  ## The maxmind geolocation IP address key for IP address lookup
+  ## see https://meta.discourse.org/t/-/137387/23 for details
+  DISCOURSE_MAXMIND_LICENSE_KEY: __SECRET__
+
+## The Docker container is stateless; all data is stored in /shared
+volumes:
+  - volume:
+      host: /var/discourse/shared/standalone
+      guest: /shared
+  - volume:
+      host: /var/discourse/shared/standalone/log/var-log
+      guest: /var/log
+
+## Plugins go here
+## see https://meta.discourse.org/t/19157 for details
+hooks:
+  after_code:
+    - exec:
+        cd: $home/plugins
+        cmd:
+          - git clone https://github.com/discourse/docker_manager.git
+          - git clone https://github.com/discourse/discourse-spoiler-alert.git
+          - git clone https://github.com/discourse/discourse-github.git
+          - git clone https://github.com/discourse/discourse-solved.git
+          - git clone https://github.com/discourse/discourse-chat-integration.git
+          - git clone https://github.com/discourse/discourse-math.git
+          - git clone https://github.com/discourse/discourse-cakeday.git
+          - git clone https://github.com/acm-21/discourse-calendar.git
+          - git clone https://github.com/discourse/discourse-checklist.git
+          - git clone https://github.com/discourse/discourse-graphviz.git
+          - git clone https://github.com/discourse/discourse-code-review.git
+          - git clone https://github.com/discourse/discourse-footnote.git
+          - git clone https://github.com/discourse/discourse-reactions.git
+          - git clone https://github.com/discourse/discourse-push-notifications.git
+          - git clone https://github.com/discourse/discourse-shared-edits.git
+          - git clone https://github.com/discourse/discourse-category-banners.git
+          - git clone https://github.com/discourse/discourse-chat.git
+          - git clone https://github.com/discourse/discourse-feature-voting.git
+          - git clone https://github.com/acm-21/discourse-pm-convert.git
+          - git clone https://github.com/acm-21/discourse-onebox-acmoj.git
+          - git clone https://github.com/acm-21/discourse-onebox-bilibili.git
+          - git clone https://github.com/acm-21/discourse-shadow-inherit-groups.git
+          - git clone https://github.com/acm-21/discourse-private-replies.git
+          - git clone https://github.com/acm-21/discourse-question-answer.git
+#          - git clone https://github.com/discourse/sticky-avatars.git
+#          - git clone https://github.com/discourse/unformatted-code-detector.git
+#          - git clone https://github.com/discourse/Discourse-nav-links-component.git
+#          - git clone https://github.com/discourse/DiscoTOC.git
+#          - git clone https://github.com/discourse/discourse-pdf-previews.git
+  after_assets_precompile:
+    - exec:
+        cd: $home
+        cmd:
+          - sudo -E -u discourse bundle exec rake s3:upload_assets
+
+## Any custom commands to run after building
+run:
+  # - exec: echo "Beginning of custom commands"
+  ## If you want to set the 'From' email address for your first registration, uncomment and change:
+  ## After getting the first signup email, re-comment the line. It only needs to run once.
+  # - exec: rails r "SiteSetting.notification_email='acm-discourse@outlook.com'"
+  # - exec: echo "End of custom commands"