add cleanup function, server memory variable

context/run-server

@@ -1,14 +1,17 @@
 #!/bin/sh
 
-export TERM=xterm-256color
-cd /spigot
+cleanup() {
+  rcon -m -p 25575 --host localhost --password "${MC_RCON_PASSWORD}" say Warning! Server is shutting down in 5 seconds...
+  sleep 5
+  rcon -m -p 25575 --host localhost --password "${MC_RCON_PASSWORD}" stop
+}
+
 cd /server
 envsubst < /spigot/server.properties.in > /server/server.properties
 [ "$ACCEPT_EULA" = "true" ] && echo eula=true > /server/eula.txt
-java -Xmx6G -jar /spigot/spigot-VERSION.jar nogui &
-JAVA_PID=$!
 
-trap "rcon -m -p 25575 --host localhost --password '${MC_RCON_PASSWORD}' stop" INT
+java -Xmx${SERVER_MEMORY:-6G} -jar /spigot/spigot-VERSION.jar nogui &
+trap "cleanup" INT
 
-wait
-wait
+# wait twice in the event sigint (docker stop) is received
+wait; wait

docker-compose.example.yaml

@@ -13,7 +13,10 @@ services:
     ports:
       - 25565:25565
     environment:
+      # Entrypoint variables
       - "ACCEPT_EULA=false"
+      - "SERVER_MEMORY=6G"
+      # server.properties Values
       - "MC_ACCEPTS_TRANSFERS=false"
       - "MC_ALLOW_FLIGHT=false"
       - "MC_ALLOW_NETHER=true"