fix add user command (#7406)

* fix add user command

* add folder /etc/seaweedfs

docker/Dockerfile.local

@@ -10,7 +10,7 @@ COPY ./entrypoint.sh /entrypoint.sh
 # Install dependencies and create non-root user
 RUN apk add --no-cache fuse curl && \
     addgroup -g 1000 seaweed && \
-    adduser -D -u 1000 -g seaweed seaweed
+    adduser -D -u 1000 -G seaweed seaweed
 
 # volume server grpc port
 EXPOSE 18080
@@ -32,6 +32,7 @@ EXPOSE 7333
 # Create data directory and set proper ownership for seaweed user
 RUN mkdir -p /data/filerldb2 && \
     chown -R seaweed:seaweed /data && \
+    chown -R seaweed:seaweed /etc/seaweedfs && \
     chmod 755 /entrypoint.sh
 
 VOLUME /data