Adding batt check and fixed MC to use full path

minecraft/mineserve

@@ -19,7 +19,7 @@ start() {
         status
         exit 0
     fi
-    screen -S minecraft -dm java -Xms1G -Xmx5G -jar server.jar nogui
+    screen -S minecraft -dm java -Xms1G -Xmx5G -jar /opt/minecraft/server.jar nogui
     pgrep -P "$(screen -list | sed -E -n 's/\s*([0-9]+).minecraft.*/\1/p')" > $PID
 }