feat: Docker compose worker server

deployments/docker-compose.yml

@@ -1,11 +1,8 @@
-services:
-  app:
+x-app-common: &app-common
   build:
     context: ..
     dockerfile: build/package/Dockerfile
-    ports:
-      - "8080:8080"
-    environment:
+  environment: &app-environment
     PORT: 8080
     DB_URL: postgres://gis:gis@postgres:5432/gis?sslmode=disable
     S3_ENDPOINT: minio:9000
@@ -25,6 +22,17 @@ services:
       condition: service_healthy
   restart: unless-stopped
 
+services:
+  app:
+    <<: *app-common
+    command: ["serve"]
+    ports:
+      - "8080:8080"
+
+  worker:
+    <<: *app-common
+    command: ["worker"]
+
   postgres:
     image: postgis/postgis:17-3.5
     # postgis/postgis has no native arm64 build; run under emulation on Apple