Create rootless Docker image for fladder (#400)

.github/workflows/build.yml

@@ -704,6 +704,18 @@ jobs:
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
+      - name: Deploy rootless-image to ghcr.io
+        uses: mr-smithers-excellent/docker-build-push@v6
+        with:
+          dockerfile: Dockerfile-rootless
+          image: fladder-rootless
+          addLatest: true
+          multiPlatform: true
+          platform: linux/amd64,linux/arm64,linux/arm/v7
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
       - name: Clean builds folder
         run: rm -rf build/web
 

Dockerfile-rootless

@@ -0,0 +1,11 @@
+FROM ghcr.io/nginxinc/nginx-unprivileged:stable-alpine-slim
+
+EXPOSE 8080
+
+ENV BASE_URL=""
+
+COPY build/web /usr/share/nginx/html
+
+RUN echo '{"baseUrl": "${BASE_URL}"}' > /usr/share/nginx/html/assets/config/config.json
+
+CMD /bin/sh -c 'sed -i "s|\${BASE_URL}|${BASE_URL}|g" /usr/share/nginx/html/assets/config/config.json && nginx -g "daemon off;"'