S16 postgresql opslag added

deploy/compose.yaml

@@ -1,6 +1,27 @@
 # Images are resolved to registry digests before replacement. Never use :main here.
 services:
+  database:
+    image: postgres:17.6
+    restart: unless-stopped
+    environment:
+      POSTGRES_DB: agiledancers
+      POSTGRES_USER: agiledancers
+      POSTGRES_PASSWORD: ${DATABASE_PASSWORD:?Required database password}
+    volumes:
+      - database-data:/var/lib/postgresql/data
+    healthcheck:
+      test: ['CMD-SHELL', 'pg_isready -U agiledancers -d agiledancers']
+      interval: 5s
+      timeout: 3s
+      retries: 12
   backend:
+    depends_on:
+      database:
+        condition: service_healthy
+    environment:
+      DATABASE_URL: jdbc:postgresql://database:5432/agiledancers
+      DATABASE_USER: agiledancers
+      DATABASE_PASSWORD: ${DATABASE_PASSWORD:?Required database password}
     image: ${BACKEND_IMAGE:?Required verified backend digest}
     platform: linux/amd64
     restart: unless-stopped
@@ -32,3 +53,7 @@ services:
       options:
         max-size: '10m'
         max-file: '3'
+
+volumes:
+  database-data:
+    name: agiledancers-production-database