Update Dockerfile

Dockerfile

@@ -20,11 +20,11 @@ RUN apt-get update \
     && chmod +x papermc.sh \
     && chmod +x backup.sh \
     && chmod +x restore.sh
-RUN groupadd -r mcuser && adduser mcuser
+RUN groupadd -r papermc && adduser papermc
 RUN chown -R ${user} /papermc
 RUN chown -R ${user} /backup
 
-USER mcuser
+USER papermc
 
 
 # Start script