refactor docker compose

docker-compose.yml

@@ -1,19 +1,34 @@
+# useful variables
+x-pretix-port: &pretix-port 80
+x-pretalx-port: &pretalx-port 81
+
+# defaults for web port configs
+x-web: &web
+  target: 80
+  app_protocol: http
+
+# defaults for all services
+x-service-defaults: &service-defaults
+  restart: always
+
+### Containers
+
 services:
+
+  # Pretix
   pretix:
+    <<: *service-defaults
     image: harbor.aalen.space/sfz.aalen/infra/images/pretix-ctbk:1743074527
     depends_on: [memcached, valkey]
-    restart: always
     ports:
       - name: web-v6
-        target: 80
-        published: 80
+        <<: *web
+        published: *pretix-port
         host_ip: "[::]"
-        app_protocol: http
       - name: web-v4
-        target: 80
-        published: 80
+        <<: *web
+        published: *pretix-port
         host_ip: "0.0.0.0"
-        app_protocol: http
     volumes:
       - ./pretix.cfg:/etc/pretix/pretix.cfg
       - /var/run/postgresql:/run/postgresql
@@ -24,13 +39,34 @@ services:
       - TZ=Europe/Berlin
     env_file: ".env-pretix"
 
-  # pretalx:
-  #   image: harbor.aalen.space/sfz.aalen/infra/images/pretalx-ctbk:1741346032
-
-  # databases
-  memcached:
-    image: docker.io/memcached:alpine
+  # Pretalx
+  pretalx:
+    <<: *service-defaults
+    image: harbor.aalen.space/sfz.aalen/infra/images/pretalx-ctbk:1741346032
+    depends_on: [valkey]
     restart: always
+    ports:
+      - name: web-v6
+        <<: *web
+        published: *pretalx-port
+        host_ip: "[::]"
+      - name: web-v4
+        <<: *web
+        published: *pretalx-port
+        host_ip: "0.0.0.0"
+    volumes:
+      - ./pretalx.cfg:/etc/pretalx/pretalx.cfg
+      - /var/run/postgresql:/run/postgresql
+      - /run/valkey:/run/valkey
+      - /var/lib/pretix:/data
+    environment:
+      - TZ=Europe/Berlin
+    env_file: ".env-pretalx"
+
+  # Cache databases
+  memcached:
+    <<: *service-defaults
+    image: docker.io/memcached:alpine
     command:
       - --conn-limit=1024
       - --memory-limit=64
@@ -39,8 +75,8 @@ services:
     volumes:
       - /run/memcached:/run/memcached
   valkey:
+    <<: *service-defaults
     image: ghcr.io/valkey-io/valkey:alpine
-    restart: always
     command:
       - /etc/valkey.conf
     volumes: