build: switch nginx docker base image to unprivileged version

Dockerfile

@@ -4,9 +4,12 @@ ARG VERSION="latest"
 ENV VERSION ${VERSION}
 RUN cd /shlink-web-client && npm ci && npm run build
 
-FROM nginx:1.25-alpine
+FROM nginxinc/nginx-unprivileged:1.25-alpine
+ARG UID=101
 LABEL maintainer="Alejandro Celaya <alejandro@alejandrocelaya.com>"
+USER root
 RUN rm -r /usr/share/nginx/html && rm /etc/nginx/conf.d/default.conf
+USER $UID
 COPY config/docker/nginx.conf /etc/nginx/conf.d/default.conf
 COPY scripts/docker/servers_from_env.sh /docker-entrypoint.d/30-shlink-servers-json.sh
 COPY --from=node /shlink-web-client/build /usr/share/nginx/html

README.md

@@ -69,7 +69,7 @@ Those servers can be exported and imported in other browsers, but if for some re
 
 If you are using the shlink-web-client docker image, you can mount the `servers.json` file in a volume inside `/usr/share/nginx/html`, which is the app's document root inside the container.
 
-    docker run --name shlink-web-client -p 8000:80 -v ${PWD}/servers.json:/usr/share/nginx/html/servers.json shlinkio/shlink-web-client
+    docker run --name shlink-web-client -p 8000:8080 -v ${PWD}/servers.json:/usr/share/nginx/html/servers.json shlinkio/shlink-web-client
 
 Alternatively, you can mount a `conf.d` directory, which in turn contains the `servers.json` file, in a volume inside `/usr/share/nginx/html`. *(since shlink-web-client 3.2.0)*.
 

config/docker/nginx.conf

@@ -1,5 +1,5 @@
 server {
-    listen 80 default_server;
+    listen 8080 default_server;
     charset utf-8;
     root /usr/share/nginx/html;
     index index.html;