feat: add the GitHub action to create a Docker image and push to Docker Registry

.github/workflows/docker-build.yml

@@ -0,0 +1,54 @@
+name: Build and Push Docker Images
+on:
+  schedule:
+    - cron: '0 0 1 * *'  # Run monthly on the 1st
+  workflow_dispatch:  # Allow manual triggers
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    strategy:
+      matrix:
+        variant:
+          - name: regular
+            file: Dockerfile
+            suffix: ''
+          - name: alpine
+            file: Dockerfile-alpine
+            suffix: '-alpine'
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+
+      - name: Log in to the Container registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata for Docker
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          tags: |
+            type=raw,value=latest${{ matrix.variant.suffix }}
+            type=raw,value={{date 'YYYYMMDD'}}${{ matrix.variant.suffix }}
+
+      - name: Build and push image
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          file: ./${{ matrix.variant.file }}
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}

README.md

@@ -20,6 +20,30 @@ Keep track of development news:
 
 Unless you wish to contribute to the project, we recommend using the hosted version at [devdocs.io](https://devdocs.io). It's up-to-date and works offline out-of-the-box.
 
+### Using Docker (Recommended)
+
+The easiest way to run DevDocs locally is using Docker:
+
+```sh
+docker run --name devdocs -d -p 9292:9292 ghcr.io/freecodcamp/devdocs:latest
+```
+
+This will start DevDocs at [localhost:9292](http://localhost:9292). We provide both regular and Alpine-based images:
+- `ghcr.io/freecodcamp/devdocs:latest` - Standard image
+- `ghcr.io/freecodcamp/devdocs:latest-alpine` - Alpine-based (smaller size)
+
+Images are automatically built and updated monthly with the latest documentation.
+
+Alternatively, you can build the image yourself:
+
+```sh
+git clone https://github.com/freeCodeCamp/devdocs.git && cd devdocs
+docker build -t devdocs .
+docker run --name devdocs -d -p 9292:9292 devdocs
+```
+
+### Manual Installation
+
 DevDocs is made of two pieces: a Ruby scraper that generates the documentation and metadata, and a JavaScript app powered by a small Sinatra app.
 
 DevDocs requires Ruby 3.3.0 (defined in [`Gemfile`](./Gemfile)), libcurl, and a JavaScript runtime supported by [ExecJS](https://github.com/rails/execjs#readme) (included in OS X and Windows; [Node.js](https://nodejs.org/en/) on Linux). Once you have these installed, run the following commands:
@@ -38,17 +62,6 @@ The `thor docs:download` command is used to download pre-generated documentation
 
 **Note:** there is currently no update mechanism other than `git pull origin main` to update the code and `thor docs:download --installed` to download the latest version of the docs. To stay informed about new releases, be sure to [watch](https://github.com/freeCodeCamp/devdocs/subscription) this repository.
 
-Alternatively, DevDocs may be started as a Docker container:
-
-```sh
-# First, build the image
-git clone https://github.com/freeCodeCamp/devdocs.git && cd devdocs
-docker build -t thibaut/devdocs .
-
-# Finally, start a DevDocs container (access http://localhost:9292)
-docker run --name devdocs -d -p 9292:9292 thibaut/devdocs
-```
-
 ## Vision
 
 DevDocs aims to make reading and searching reference documentation fast, easy and enjoyable.