Add environment variables for port mappings

compose.yml

@@ -25,7 +25,7 @@ services:
       minecraft_server_network:
         ipv4_address: "10.100.1.3"
     ports:
-      - 25000:25565
+      - ${VELOCITY_PORT}:25565
     volumes:
       - velocity_data:/server:rw
       - ./velocity/config:/config:ro
@@ -78,7 +78,7 @@ services:
       minecraft_server_network:
         ipv4_address: "10.100.1.6"
     ports:
-      - 8100:8100
+      - ${BLUEMAP_PORT}:8100
     volumes:
       - bluemap_data:/app/data:rw
       - bluemap_web:/app/web:rw
@@ -318,7 +318,7 @@ services:
       minecraft_server_network:
         ipv4_address: "10.100.1.2"
     ports:
-      - 5434:5432
+      - ${LUCKPERMS_PORT}:5432
     volumes:
       - luckperms_data:/var/lib/postgresql/data:rw
       - /etc/passwd:/etc/passwd:ro