feat(docker): build and publish unprivileged Docker image

Similar to swagger-editor

This will allow to deploy Swagger-UI on clusters such as
OpenShift without having to meddle with the security
context and security context constraints.

Author: sgaist

.github/workflows/docker-build-push.yml

@@ -56,6 +56,12 @@ jobs:
           - linux/arm64
           - linux/386
           - linux/ppc64le
+        docker:
+          - file: Dockerfile
+            tag: ${{ needs.inputs.outputs.docker_tag }}
+          - file: Dockerfile.unprivileged
+            tag: ${{ needs.inputs.outputs.docker_tag }}-unprivileged
+
     needs:
       - inputs
 
@@ -82,6 +88,8 @@ jobs:
         with:
           context: .
           platforms: ${{ matrix.platform }}
+          file: ${{ matrix.docker.file }}
+          tags: ${{ matrix.docker.tag }}
           provenance: false
           outputs: type=image,name=${{ env.REGISTRY_IMAGE }},push-by-digest=true,name-canonical=true,push=true
 
@@ -114,6 +122,12 @@ jobs:
       - inputs
       - build
 
+    strategy:
+      matrix:
+        tag:
+          - ${{ needs.inputs.outputs.docker_tag }}
+          - ${{ needs.inputs.outputs.docker_tag }}-unprivileged
+
     steps:
       - name: Download digests
         uses: actions/download-artifact@v4
@@ -134,10 +148,10 @@ jobs:
       - name: Create manifest list and push
         working-directory: /tmp/digests
         run: |
-          docker buildx imagetools create -t ${{ env.REGISTRY_IMAGE }}:${{ needs.inputs.outputs.docker_tag }} \
-            ${{ env.REGISTRY_IMAGE }}:${{ needs.inputs.outputs.docker_tag }} \
+          docker buildx imagetools create -t ${{ env.REGISTRY_IMAGE }}:${{ matrix.tag }} \
+            ${{ env.REGISTRY_IMAGE }}:${{ matrix.tag }} \
             $(printf '${{ env.REGISTRY_IMAGE }}@sha256:%s ' *)
 
       - name: Inspect image
         run: |
-          docker buildx imagetools inspect ${{ env.REGISTRY_IMAGE }}:${{ needs.inputs.outputs.docker_tag }}
+          docker buildx imagetools inspect ${{ env.REGISTRY_IMAGE }}:${{ matrix.tag }}

Dockerfile

@@ -31,7 +31,7 @@ COPY --chmod=0555 ./docker/docker-entrypoint.d/ /docker-entrypoint.d/
 COPY --chmod=0666 ./docker/configurator /usr/share/nginx/configurator
 
 # Simulates running NGINX as a non root; in future we want to use nginxinc/nginx-unprivileged.
-# In future we will have separate unpriviledged images tagged as v5.1.2-unprivileged.
+# In future we will have separate unprivileged images tagged as v5.1.2-unprivileged.
 RUN chmod 777 /usr/share/nginx/html/ /etc/nginx/conf.d/ /etc/nginx/conf.d/default.conf /var/cache/nginx/ /var/run/
 
 EXPOSE 8080

Dockerfile.unprivileged

@@ -0,0 +1,42 @@
+# Looking for information on environment variables?
+# We don't declare them here — take a look at our docs.
+# https://github.com/swagger-api/swagger-ui/blob/master/docs/usage/configuration.md
+
+FROM nginxinc/nginx-unprivileged:1.27.5-alpine
+
+LABEL maintainer="[email protected]" \
+      org.opencontainers.image.authors="[email protected]" \
+      org.opencontainers.image.url="docker.swagger.io/swaggerapi/swagger-ui" \
+      org.opencontainers.image.source="https://github.com/swagger-api/swagger-ui" \
+      org.opencontainers.image.description="SwaggerUI Docker image" \
+      org.opencontainers.image.licenses="Apache-2.0"
+
+USER root
+
+RUN apk add --update-cache --no-cache "nodejs" "libxml2>=2.13.4-r6" "libexpat>=2.7.0-r0" "libxslt>=1.1.42-r2" "xz-libs>=5.6.3-r1" "c-ares>=1.34.5-r0"
+RUN mkdir /etc/nginx/templates && \
+    mkdir /usr/share/nginx/configurator && \
+    # If user is set to a different ID at runtime, html must be writable by them too
+    chown -R nginx:nginx /usr/share/nginx/html && \
+    chmod a+rw /usr/share/nginx/html
+
+USER nginx
+
+LABEL maintainer="char0n"
+
+ENV API_KEY="**None**" \
+    SWAGGER_JSON="/app/swagger.json" \
+    PORT="8080" \
+    PORT_IPV6="" \
+    BASE_URL="/" \
+    SWAGGER_JSON_URL="" \
+    CORS="true" \
+    EMBEDDING="false"
+
+COPY --chmod=0666 ./docker/default.conf.template ./docker/cors.conf ./docker/embedding.conf /etc/nginx/templates/
+
+COPY --chown=nginx --chmod=0666 ./dist/* /usr/share/nginx/html/
+COPY --chmod=0555 ./docker/docker-entrypoint.d/ /docker-entrypoint.d/
+COPY --chown=nginx --chmod=0666 ./docker/configurator /usr/share/nginx/configurator
+
+EXPOSE 8080

docs/development/docker.md

@@ -0,0 +1,21 @@
+# Docker images
+
+## Building locally
+
+**Privileged image**:
+
+```sh
+ $ docker build . -t swaggerapi/swagger-ui:next
+ $ docker run -d -p 8080:8080 swaggerapi/swagger-ui:next
+```
+
+Now open your browser at `http://localhost:8080/`.
+
+**Unprivileged image**:
+
+```sh
+ $ docker build . -f Dockerfile.unprivileged -t swaggerapi/swagger-ui:next-unprivileged
+ $ docker run -d -p 8080:8080 swaggerapi/swagger-ui:next-unprivileged
+```
+
+Now open your browser at `http://localhost:8080/`.