refactor(server): use proxy mechanisms to remove server_url config

docker-compose.prod.yml

@@ -7,8 +7,6 @@ services:
     env_file: .env
     ports:
       - 3100:3100
-    depends_on:
-      - postgres
 
   client:
     image: amruthpillai/reactive-resume:client-latest
@@ -18,6 +16,3 @@ services:
       - 3000:3000
     depends_on:
       - server
-
-volumes:
-  pgdata: