add build ci

.github/workflows/ci.yml

@@ -0,0 +1,19 @@
+name: Build and Push to ghcr.io
+
+on:
+  push:
+    branches: [main]
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v4
+
+      - name: Build and push Docker image
+        run: |
+          docker build -t ghcr.io/serverussnap/imagegenerator:latest .
+          echo "${{ secrets.GHCR_TOKEN }}" | docker login ghcr.io -u serverussnap --password-stdin
+          docker push ghcr.io/serverussnap/imagegenerator:latest