build image based on nginx unprivileged

container/Dockerfile

@@ -1,7 +1,13 @@
-FROM nginx:alpine
+FROM nginxinc/nginx-unprivileged:alpine
+
+USER root
 
 RUN rm -rf /usr/share/nginx/html/*
 
 COPY site/ /usr/share/nginx/html/
 
-EXPOSE 80
+RUN chown -R 101:101 /usr/share/nginx/html
+
+USER 101
+
+EXPOSE 8080