Remove unused port mappings

Author: alejandro-du

docker-compose.yaml

@@ -2,8 +2,6 @@ version: "3.9"
 services:
   server-1:
     image: alejandrodu/mariadb
-    ports:
-      - "3306:3306"
     environment:
       - MARIADB_CREATE_DATABASE=demo
       - MARIADB_CREATE_USER=user:Password123!
@@ -12,15 +10,11 @@ services:
 
   server-2:
     image: alejandrodu/mariadb
-    ports:
-      - "3307:3306"
     environment:
       - MARIADB_REPLICATE_FROM=replication_user:ReplicationPassword123!@server-1:3306
 
   server-3:
     image: alejandrodu/mariadb
-    ports:
-      - "3308:3306"
     environment:
       - MARIADB_REPLICATE_FROM=replication_user:ReplicationPassword123!@server-1:3306