remove version in docker-compose.yml

docker-compose.prod.yml

@@ -1,5 +1,3 @@
-version: "3.8"
-
 services:
   # MongoDB Database Service
   mongodb:

docker-compose.yml

@@ -1,5 +1,3 @@
-version: "3.8"
-
 services:
   # MongoDB Database Service
   mongodb: