Update Dockerfile

Dockerfile

@@ -4,11 +4,7 @@ MAINTAINER fithwum
 ENV UID=99
 ENV GUID=100
 
-RUN deluser node
-RUN addgroup -g $GUID foundry \
-    && adduser -u $UID -G foundry -s /bin/sh -D foundry
-
-USER foundry
+USER node
 
 RUN mkdir -p /foundry/fvtt
 RUN mkdir -p /foundry/data