Fix build action

.dockerignore

@@ -0,0 +1,8 @@
+_site
+.jekyll-cache
+.jekyll-metadata
+node_modules
+vendor
+.git
+.github
+tmp

.github/workflows/jekyll.yml

@@ -21,8 +21,15 @@ jobs:
         cache: 'npm'
     - run: npm install
 
+    - uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: ${{steps.versions.outputs.ruby}}
+        bundler-cache: true
+
     - name: Build
-      uses: jerryjvl/jekyll-build-action@v1
+      env:
+        JEKYLL_ENV: production
+      run: bundle exec jekyll build
 
     - name: Tailscale
       uses: tailscale/github-action@v2

CONTRIBUTING.md

@@ -1,12 +1,19 @@
 # Contributing
 
-This is a Jekyll site. Ruby is therefore required. `asdf` users can run `asdf install` and be on their way.
+This is a Jekyll site. You can run it either with Docker (recommended — no local Ruby/Node setup) or directly on your machine.
 
-The site is bundled with `bundler 2.0.x`. Ensure you have the correct major version: `bundle --version`.
+## Development with Docker
 
-## Development
+Requires Docker with Compose. 
 
-The standard Jekyll commands apply.
+- To start, run `docker compose up` (add `--build` after Gemfile or package.json changes)
+- The website will be available at `http://localhost:4000/`
+- Edit any file and the website should reload automatically
+- Stop: `docker compose down`
+
+## Development without Docker
+
+Ruby and Node are required. `asdf` users can run `asdf install` and be on their way. The site is bundled with `bundler 2.3.x` — ensure you have the correct major version: `bundle --version`.
 
 - Install dependencies: `bundle` and `npm install`.
 - Run a development server: `bundle exec jekyll server`.

Dockerfile

@@ -0,0 +1,22 @@
+FROM node:16-bullseye-slim AS node
+
+FROM ruby:3.0.3-slim-bullseye
+
+COPY --from=node /usr/local/bin/node /usr/local/bin/node
+COPY --from=node /usr/local/bin/npm /usr/local/bin/npm
+COPY --from=node /usr/local/lib/node_modules /usr/local/lib/node_modules
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+      build-essential \
+      git \
+    && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+
+COPY Gemfile Gemfile.lock ./
+RUN bundle install
+
+COPY package.json package-lock.json ./
+RUN npm install
+
+CMD ["bundle", "exec", "jekyll", "server", "--host", "0.0.0.0", "--force_polling", "--livereload"]

docker-compose.yml

@@ -0,0 +1,15 @@
+services:
+  jekyll:
+    build: .
+    ports:
+      - "4000:4000"
+      - "35729:35729"
+    volumes:
+      - .:/app
+      - bundle_cache:/usr/local/bundle
+      - node_modules_cache:/app/node_modules
+    stdin_open: true
+
+volumes:
+  bundle_cache:
+  node_modules_cache: