Add Docker image workflow

.github/workflows/docker-image.yml

@@ -0,0 +1,72 @@
+name: Docker Image CI
+
+on:
+  push:
+    branches: [ "daniel-koala", "adam", "bisha" ]
+  pull_request:
+    branches: [ "daniel-koala", "adam", "bisha" ]
+
+env:
+  REGISTRY: ghcr.io
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+    - uses: actions/checkout@v5
+
+    - name: Set image name from branch
+      id: image-name
+      run: |
+        declare -A BRANCH_MAP
+        BRANCH_MAP[daniel-koala]="code-tracking-qa"
+        BRANCH_MAP[adam]="code-tracking-emote"
+        BRANCH_MAP[bisha]="code-tracking-ai"
+
+        BRANCH="${GITHUB_HEAD_REF:-$GITHUB_REF_NAME}"
+        IMAGE_NAME="${BRANCH_MAP[$BRANCH]}"
+
+        if [ -z "$IMAGE_NAME" ]; then
+          echo "No image mapping for branch: $BRANCH"
+          exit 1
+        fi
+
+        REPO_OWNER="${{ github.repository_owner }}"
+        echo "image_name=${REPO_OWNER,,}/${IMAGE_NAME}" >> "$GITHUB_OUTPUT"
+
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v3
+
+    - name: Log in to GitHub 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: ${{ env.REGISTRY }}/${{ steps.image-name.outputs.image_name }}
+        tags: |
+          type=sha
+          type=ref,event=branch
+          type=ref,event=pr
+          type=raw,value=latest
+
+    - name: Build and push Docker image
+      uses: docker/build-push-action@v6
+      with:
+        context: .
+        file: ./Dockerfile
+        push: ${{ github.event_name != 'pull_request' }}
+        tags: ${{ steps.meta.outputs.tags }}
+        labels: ${{ steps.meta.outputs.labels }}
+        cache-from: type=gha
+        cache-to: type=gha,mode=max