implemented draf for gitlab role

templates/docker-postgres-service.yml.j2

@@ -0,0 +1,19 @@
+  
+  database:
+    image: postgres:{{database_version}}-alpine
+    ports:
+      - "9432:5432"
+    environment:
+      - POSTGRES_PASSWORD={{database_password}}
+      - POSTGRES_USER={{database_username}}
+      - POSTGRES_DB={{database_databasename}}
+    restart: unless-stopped
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U {{database_username}}"]
+      interval: 10s
+      timeout: 5s
+      retries: 6
+    volumes:
+      - type: volume
+        source: database
+        target: /var/lib/postgresql/data