This may or may not work

.env

@@ -0,0 +1,2 @@
+SERVICE_NAME=mcsd
+NETWORK_NAME=mcsdnet

docker-compose.yml

@@ -1,7 +1,7 @@
 services:
- mcsd:
+ ${SERVICE_NAME}:
   build: .
-  container_name: mcsd
+  container_name: ${SERVICE_NAME}
   restart: unless-stopped
   stop_grace_period: 120s
   volumes:
@@ -11,9 +11,9 @@ services:
   ports:
    - 25565:25565
   networks:
-   - mcsdnet
+   - ${NETWORK_NAME}
 
 networks:
- mcsdnet:
-  name: mcsdnet
+ ${NETWORK_NAME}:
+  name: ${NETWORK_NAME}
   external: false

rcon.sh

@@ -1,2 +1,3 @@
 #!/bin/bash
-docker compose exec -it mcsd rcon -a 127.0.0.1:25575 -p mcsdrcon
+source .env
+docker compose exec -it ${SERVICE_NAME} rcon -a 127.0.0.1:25575 -p mcsdrcon