feat: add push step to workflow

Author: undefinedhuman

.github/workflows/docker-image.yml

@@ -7,12 +7,18 @@ on:
     branches: [ "main" ]
 
 jobs:
-
   build:
-
     runs-on: ubuntu-latest
-
     steps:
-    - uses: actions/checkout@v4
-    - name: Build the Docker image
-      run: docker build . --file Dockerfile --tag cosmify/docs:$(date +%s)
+      - name: 'Checkout GitHub Action'
+        uses: actions/checkout@main
+      - name: 'Login to GitHub Container Registry'
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{github.actor}}
+          password: ${{secrets.GITHUB_TOKEN}}
+      - name: 'Build & Push Image'
+        run: |
+          docker build . --tag ghcr.io/cosmify-dev/docs:latest
+          docker push ghcr.io/cosmify-dev/docs:latest