[GithubActions] Update deploy step

.github/workflows/build.yml

@@ -9,7 +9,7 @@ on:
       - main
 
 jobs:
-  build-and-push:
+  build:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
@@ -29,3 +29,32 @@ jobs:
         with:
           name: build-artifacts
           path: bin/k6
+
+  deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Download Artifacts
+        uses: actions/download-artifact@v2
+        with:
+          name: build-artifacts
+          path: bin/k6
+
+      - name: Set up Docker Build
+        uses: docker/setup-buildx-action@v1
+
+      - name: Log in to GitHub Container Registry
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and push Docker image
+        env:
+          IMAGE_NAME: ghcr.io/matrixxsoftware/xk6-diameter:latest
+        run: |
+          make docker
+          docker push $IMAGE_NAME