diff --git a/Dockerfile b/Dockerfile
index 7934653..4ee11da 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -21,7 +21,9 @@ RUN set -ex \
  && apk --no-cache add \
       bash \
       ca-certificates \
-      dumb-init
+      dumb-init \
+ && mkdir /data \
+ && chown -R 1000:1000 /data
 
 COPY --from=builder /go/bin/nginx-sso                                     /usr/local/bin/
 COPY --from=builder /go/src/github.com/Luzifer/nginx-sso/config.yaml      /usr/local/share/nginx-sso/
diff --git a/docker-start.sh b/docker-start.sh
index 74cc9bf..0bcd68d 100755
--- a/docker-start.sh
+++ b/docker-start.sh
@@ -2,7 +2,7 @@
 set -euo pipefail
 
 # Copy frontend if not available
-[ -d /data/frontend/index.html ] || cp -r /usr/local/share/nginx-sso/frontend /data/
+[ -f /data/frontend/index.html ] || cp -r /usr/local/share/nginx-sso/frontend /data/
 
 [ -e /data/config.yaml ] || {
   cp /usr/local/share/nginx-sso/config.yaml /data/config.yaml