Fix GitHub Actions workflow structure and artifact generation

Author: gbadedata

.github/workflows/docker.yml

@@ -1,23 +1,81 @@
-test:
-  runs-on: ubuntu-latest
+name: CI-CD Docker to GHCR
 
-  steps:
-    - name: Check out repository
-      uses: actions/checkout@v4
+on:
+  push:
+    branches:
+      - main
+  workflow_dispatch:
 
-    - name: Set up Python
-      uses: actions/setup-python@v5
-      with:
-        python-version: "3.11"
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: gbadedata/ml-inference-api
 
-    - name: Install dependencies
-      run: |
-        python -m pip install --upgrade pip
-        pip install -r requirements.txt
-        pip install pytest
+jobs:
+  test:
+    runs-on: ubuntu-latest
 
-    - name: Train model artifact
-      run: python model/train.py
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
 
-    - name: Run tests
-      run: pytest
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r requirements.txt
+          pip install pytest
+
+      - name: Train model artifact
+        run: python model/train.py
+
+      - name: Verify model artifact exists
+        run: ls -R model
+
+      - name: Run tests
+        run: pytest
+
+  build-and-push:
+    runs-on: ubuntu-latest
+    needs: test
+
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
+
+      - name: Train model artifact
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r requirements.txt
+          python model/train.py
+
+      - name: Log in to GHCR
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract Docker metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          tags: |
+            type=raw,value=latest
+            type=sha
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}