Updated docker build and push

.github/workflows/docker-build.yml

@@ -1,16 +1,41 @@
-name: Docker Build
+name: Docker Build and Push
 
 on:
   push:
-    branches: [ "main" ]  # Adjust this if you want to trigger on a different branch
+    branches: [ "master" ]
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
 
 jobs:
-  build:
+  build-and-push:
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
 
     steps:
     - name: Check out repository
       uses: actions/checkout@v3
 
-    - name: Build Docker image
-      run: docker build -t my-reddit-monitor .
+    - name: Log in to the Container registry
+      uses: docker/login-action@v2
+      with:
+        registry: ${{ env.REGISTRY }}
+        username: ${{ github.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: Extract metadata (tags, labels) for Docker
+      id: meta
+      uses: docker/metadata-action@v4
+      with:
+        images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+
+    - name: Build and push Docker image
+      uses: docker/build-push-action@v4
+      with:
+        context: .
+        push: true
+        tags: ${{ steps.meta.outputs.tags }}
+        labels: ${{ steps.meta.outputs.labels }}