fix(docker): n8n docker image needs su-exec (#3993)

docker/images/n8n/Dockerfile

@@ -20,5 +20,6 @@ RUN set -eux; \
 # Set a custom user to not have n8n run as root
 USER root
 WORKDIR /data
+RUN apk --no-cache add su-exec
 COPY docker-entrypoint.sh /docker-entrypoint.sh
 ENTRYPOINT ["tini", "--", "/docker-entrypoint.sh"]

docker/images/n8n/docker-entrypoint.sh

@@ -13,5 +13,5 @@ if [ "$#" -gt 0 ]; then
   exec su-exec node "$@"
 else
   # Got started without arguments
-  exec su-exec n8n
+  exec su-exec node n8n
 fi