Docker image is now used to launch the tool, instead of containing the site.

Author: ayosec

.github/workflows/test-docker.yaml

@@ -0,0 +1,25 @@
+name: Test Docker Image
+
+on:
+  pull_request:
+    branches: main
+  push:
+    branches: ["*"]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Build Docker Image
+        run: docker build -t ffdocs -f docker/Dockerfile .
+
+      - name: Build a Website
+        run: |
+          set -xe
+
+          out=$(mktemp -d)
+          docker run --volume "$out:/out" --rm ffdocs -o /out -v 1.0.*
+          test "$(find "$out" -name '*.html' | wc -l)" -ge 2

docker/Dockerfile

@@ -1,5 +1,4 @@
-# Debian Bookworm to build the website.
-FROM ruby:3.2-bookworm AS docs
+FROM ruby:3.2-bookworm
 
 RUN \
     DEBIAN_FRONTEND=noninteractive \
@@ -13,23 +12,9 @@ RUN \
         texinfo              \
         zstd
 
-
-# Install gems before adding the source code, so they can be reused
-# if the pages are rebuilt without changing dependencies.
-
-ENV BUNDLE_FORCE_RUBY_PLATFORM=true
-
-WORKDIR /gemfile
-ADD Gemfile .
-ADD Gemfile.lock .
-RUN bundle install
-
-
 WORKDIR /app
-ADD . .
-RUN ./ffmpeg-filters-docs --output /output
 
+ADD . .
+RUN bundle install --frozen
 
-# HTTP server.
-FROM nginx
-COPY --from=docs /output /usr/share/nginx/html
+ENTRYPOINT [ "bundle", "exec", "./ffmpeg-filters-docs" ]