Renamed Database roles

roles/svc-postgres/config/main.yml

@@ -0,0 +1,11 @@
+hostname: "central-postgres"
+network:  "central_postgres"
+port: 5432
+docker:
+  images:
+    # Postgis is necessary for mobilizon
+    postgres: postgis/postgis
+  versions:  
+    # Please set an version in your inventory file! 
+    # Rolling release isn't recommended
+    postgres: "latest"