chore: revert "ci: non-root container image (#437)" for MS8 as it cha…

…nges a port

This reverts commit 7f732a1.

docker/Dockerfile

@@ -1,42 +1,37 @@
 # Stage 1: Install node modules
-FROM docker.io/library/node:lts as npm-install
+FROM node:lts as npm-install
 
 WORKDIR /app
 COPY ./package*.json /app/
 RUN npm install
 
 # Stage 2: Build Project
-FROM docker.io/library/node:lts as build
+FROM node:lts as build
 
 WORKDIR /app
 COPY --from=npm-install /app/node_modules /app/node_modules
 COPY ./ /app/
 RUN npm run ng build --no-progress --configuration=production
 
 # Stage 3: Serve app with nginx
-FROM docker.io/nginxinc/nginx-unprivileged:1.25-alpine3.18
+FROM nginx:1.25.2-alpine
 
-# Temporarily switch to root to install packages and create symlink in restricted location
-USER root
-RUN apk add --no-cache jq curl
+RUN apk update && apk add jq esh --no-cache
 
 COPY --from=build /app/dist/edc-demo-client /usr/share/nginx/html
 COPY --from=build /app/src/assets /usr/share/nginx/html/assets
-COPY docker/default.conf.template etc/nginx/templates/default.conf.template
-# Before starting nginx, apply ENV vars to create app-config.json from EDC_UI_* ENV Vars
-# Use an entrypoint drop-in instead of modifying the default entrypoint or command,
-# so that the automatic envsubst templating is not disabled.
-COPY docker/99-generate-app-config.sh /docker-entrypoint.d/99-generate-app-config.sh
+COPY docker/default.conf.esh etc/nginx/conf.d/default.conf.esh
 
-RUN ln -sf /tmp/app-config.json /usr/share/nginx/html/assets/config/app-config.json \
-  # Nginx is configured to reject symlinks that point to a file owned by a different user, for security reasons
-  && chown --no-dereference nginx:root /usr/share/nginx/html/assets/config/app-config.json
+ENV NGINX_BIND=""
+ENV NGINX_PORT=80
 
-# Switch back to unprivileged user for runtime
-USER nginx:nginx
+HEALTHCHECK --interval=2s --timeout=5s --retries=10 \
+  CMD curl -f http://${NGINX_BIND:"localhost"}:$NGINX_PORT/ || exit 1
 
-ENV NGINX_BIND="0.0.0.0"
-ENV NGINX_PORT=8080
+# Before starting nginx, apply ENV vars:
+# (1) Apply NGINX_BIND and NGINX_PORT to nginx.conf
+# (2) Create app-config.json from EDC_UI_* ENV Vars
+CMD esh -o /etc/nginx/conf.d/default.conf /etc/nginx/conf.d/default.conf.esh \
+ && jq -n 'env | with_entries( select(.key | startswith("EDC_UI_") ) )' > /usr/share/nginx/html/assets/config/app-config.json \
+ && nginx -g "daemon off;"
 
-HEALTHCHECK --interval=2s --timeout=5s --retries=10 \
-  CMD curl -f http://$NGINX_BIND:$NGINX_PORT/ || exit 1

docker/default.conf.template → docker/default.conf.esh

@@ -1,9 +1,5 @@
-access_log /dev/stdout;
-error_log /dev/stderr;
-disable_symlinks if_not_owner;
-
 server {
-    listen ${NGINX_BIND}:${NGINX_PORT};
+    listen <%= $NGINX_BIND %><% if "$NGINX_BIND" ; then -%>:<% fi -%><%= $NGINX_PORT %>;
     server_name localhost;
 
     root /usr/share/nginx/html;
@@ -16,3 +12,4 @@ server {
     # Our OAuth Proxies currently have an issue with very large cookies
     large_client_header_buffers 8 32k;
 }
+