[Docker] Add the discord joiner as an optional service

.env.sample

@@ -37,5 +37,16 @@
 # Development Only
 #
 
-# Start the integrated solargraph service from the compose file. Requires a rebuild when changed.
-# export COMPOSE_PROFILES=solargraph
+# solargraph: Start the integrated solargraph service from the compose file. Requires a rebuild when gems change.
+# discord: Starts the discord integration to join users to a discord server.
+#          The application must have its OAuth2 redirect URI set to ${JOINER_BASE_URL}/callback.
+#
+# COMPOSE_PROFILES=solargraph,discord
+
+# The following environment variables are required when using the 'discord' profile:
+
+# JOINER_BOT_TOKEN=
+# JOINER_OAUTH2_CLIENT_ID=
+# JOINER_OAUTH2_CLIENT_SECRET=
+# JOINER_GUILD_ID=
+# JOINER_FAILED_JOIN_WEBHOOK_URL=

config/danbooru_default_config.rb

@@ -320,11 +320,9 @@ module Danbooru
     end
 
     def discord_site
-      "http://localhost:8000"
     end
 
     def discord_secret
-      "abc123"
     end
 
     # Maximum size of an upload. If you change this, you must also change

docker-compose.yml

@@ -6,6 +6,8 @@ x-environment: &common-env
   DANBOORU_ELASTICSEARCH_HOST: elastic
   DANBOORU_MEMCACHED_SERVERS: memcached
   DANBOORU_IQDB_SERVER: http://iqdb:5588
+  DANBOORU_DISCORD_SITE: http://localhost:8000
+  DANBOORU_DISCORD_SECRET: super_secret_for_url_discord
   # These are just development secrets, do not use them in production
   SECRET_TOKEN: 1c58518a891eff4520cadc59afa9e378a9325f1247544ff258096e497f095f45
   SESSION_SECRET_KEY: 44b4f44e9f253c406cbe727d403d500c1cecff943e4d2aea8f5447f28846fffe
@@ -113,6 +115,26 @@ services:
     volumes:
       - iqdb_data:/iqdb
 
+  # Discord integration
+
+  discord_joiner:
+    image: ghcr.io/e621ng/discord_joiner:71c6abe72a93b2cfad129d1156108c93f920d880
+    environment:
+      FETCH_SECRET: abc123
+      URL_SECRET: super_secret_for_url_discord
+      JOINER_BASE_URL: http://localhost:8000
+      BOT_TOKEN: ${JOINER_BOT_TOKEN}
+      OAUTH2_CLIENT_ID: ${JOINER_OAUTH2_CLIENT_ID}
+      OAUTH2_CLIENT_SECRET: ${JOINER_OAUTH2_CLIENT_SECRET}
+      GUILD_ID: ${JOINER_GUILD_ID}
+      FAILED_JOIN_URL: ${JOINER_FAILED_JOIN_WEBHOOK_URL}
+    ports:
+      - 8000:8000
+    volumes:
+      - discord_joiner_data:/opt/app/data
+    profiles:
+      - discord
+
   # Useful for development
 
   tests:
@@ -164,3 +186,4 @@ volumes:
   public_packs:
   public_packs_test:
   rubocop_cache:
+  discord_joiner_data: