feat: add automated container build

Use the `docker/build-push` and `docker/metadata` actions to build
a container and add the proper tag depending on the branch, PR or
the tagged version using semver as the proper version.

Closes #80

Signed-off-by: Jonathan Gonzalez V <[email protected]>

Author: sxd

.github/workflows/docker-build.yml

@@ -2,14 +2,52 @@ name: Docker Image CI
 
 on: [push, pull_request]
 
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
 jobs:
 
   docker-build:
-
     runs-on: ubuntu-latest
-
+    permissions:
+      contents: read
+      packages: write
     steps:
     - name: Checkout
       uses: actions/checkout@v3
-    - name: Build the Docker image
-      run: docker build . --file Dockerfile --tag spellcheck:$(date +%s)
+
+    - name: Set up QEMU
+      uses: docker/[email protected]
+      with:
+        image: tonistiigi/binfmt:qemu-v6.2.0
+
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v1
+      with:
+        install: true
+
+    - name: Login to GitHub Registry
+      uses: docker/[email protected]
+      with:
+        registry: ${{ env.REGISTRY }}
+        username: ${{ github.repository_owner }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: Metadata for the image
+      id: meta
+      uses: docker/metadata-action@v4
+      with:
+        images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+        tags: |
+          type=ref,event=branch
+          type=ref,event=pr
+          type=semver,pattern={{version}}
+
+    - name: Build container
+      uses: docker/[email protected]
+      with:
+        platforms: "linux/amd64, linux/arm64"
+        context: .
+        push: true
+        tags: ${{ steps.meta.outputs.tags }}