refactor: standalone docker-compose for L2 activitypub stack

docker-compose.yml

@@ -2,19 +2,16 @@ version: "3.8"
 
 services:
   l2-server:
-    build: .
     image: git.rose-ash.com/art-dag/l2-server:latest
-    ports:
-      - "8200:8200"
     environment:
       - ARTDAG_DOMAIN=artdag.rose-ash.com
       - ARTDAG_USER=giles
       - ARTDAG_DATA=/data/l2
-      - ARTDAG_L1=http://l1-server:8100
+      - ARTDAG_L1=http://celery_l1-server:8100
     volumes:
       - l2_data:/data/l2
     networks:
-      - artdag
+      - externalnet
     deploy:
       replicas: 1
       restart_policy:
@@ -24,5 +21,5 @@ volumes:
   l2_data:
 
 networks:
-  artdag:
+  externalnet:
     external: true