Fix path to frontend service

docker/Dockerfile

@@ -46,7 +46,7 @@ RUN yarn install \
 COPY docker/rootfs /
 
 # Remove frontend service not required for prod, dev nginx config as well
-RUN rm -rf /etc/services.d/frontend /etc/nginx/conf.d/dev.conf \
+RUN rm -rf /etc/s6-overlay/s6-rc.d/user/contents.d/frontend /etc/nginx/conf.d/dev.conf \
 	&& chmod 644 /etc/logrotate.d/nginx-proxy-manager \
 	&& pip uninstall --yes setuptools \
 	&& pip install --no-cache-dir "setuptools==58.0.0"