push docker image to registry

.github/workflows/docker.yml

@@ -0,0 +1,47 @@
+name: Build CI
+
+on:
+  push:
+    branches: ["main"]
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: orchestra
+  IMAGE_AUTHOR: uzinfocom-org
+
+jobs:
+  build-and-push-image:
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Install Nix
+        uses: DeterminateSystems/nix-installer-action@main
+
+      - name: Cache Nix store
+        uses: DeterminateSystems/magic-nix-cache-action@main
+
+      - name: Build docker image
+        run: nix build .#docker
+
+      - name: Load docker image
+        run: ./result | docker load
+
+      - name: Log in to the Container registry
+        uses: docker/login-action@f054a8b539a109f9f41c372932f1ae047eff08c9
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ env.IMAGE_AUTHOR }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Tag the image
+        run: docker tag $(docker images --format "{{.Repository}}:{{.Tag}}" | grep orchestra) ${{ env.REGISTRY }}/${{ env.IMAGE_AUTHOR }}/${{ env.IMAGE_NAME }}
+
+      - name: Push the image
+        run: docker push ${{ env.REGISTRY }}/${{ env.IMAGE_AUTHOR }}/${{ env.IMAGE_NAME }}