Use merge references in compose

ansible/roles/mastodon/templates/docker-compose.mastodon.yaml

@@ -59,69 +59,51 @@ services:
   #     - '127.0.0.1:9200:9200'
 
   mastodon_web:
-    container_name: mastodon_web
+    <<: &mastodon
       build: src
-    image: ghcr.io/mastodon/mastodon:v4.2.1
+      image: local_mastodon
       restart: always
       env_file: .env.production
-    command: bash -c "rm -f /mastodon/tmp/pids/server.pid; bundle exec rails s -p 3000"
       networks:
         - mastodon
         - nginx
+      depends_on:
+        - mastodon_db
+        - mastodon_redis
+        # - es
+    container_name: mastodon_web
     healthcheck:
       # prettier-ignore
       test: ['CMD-SHELL', 'wget -q --spider --proxy=off localhost:3000/health || exit 1']
     ports:
       - '127.0.0.1:3000:3000'
-    depends_on:
-      - mastodon_db
-      - mastodon_redis
-      # - es
     volumes:
       - ./src/public/system:/mastodon/public/system
+    command: bash -c "rm -f /mastodon/tmp/pids/server.pid; bundle exec rails s -p 3000"
 
   mastodon_streaming:
+    <<: *mastodon
     container_name: mastodon_streaming
-    build: src
-    image: ghcr.io/mastodon/mastodon:v4.2.1
-    restart: always
-    env_file: .env.production
     environment:
       - PORT=5000
     command: node ./streaming
-    networks:
-      - mastodon
-      - nginx
     healthcheck:
       # prettier-ignore
       test: ['CMD-SHELL', 'wget -q --spider --proxy=off localhost:4000/api/v1/streaming/health || exit 1']
     ports:
       - '127.0.0.1:5000:5000'
-    depends_on:
-      - mastodon_db
-      - mastodon_redis
 
 {% for i in range(mastodon_sidekiq_count) %}
   mastodon_sidekiq_{{ i }}:
+    <<: *mastodon
     container_name: mastodon_sidekiq_{{ i }}
-    build: src
-    image: ghcr.io/mastodon/mastodon:v4.2.1
-    restart: always
-    env_file: .env.production
     environment:
       - DB_POOL={{ mastodon_sidekiq_threads }}
     command: bundle exec sidekiq -c {{ mastodon_sidekiq_threads }}
-    depends_on:
-      - mastodon_db
-      - mastodon_redis
-    networks:
-      - mastodon
-      - nginx
     volumes:
       - ./src/public/system:/mastodon/public/system
     healthcheck:
       test: ['CMD-SHELL', "ps aux | grep '[s]idekiq\ 6' || false"]
-
 {% endfor %}
 
   ## Uncomment to enable federation with tor instances along with adding the following ENV variables