ci: adds github workflow that builds container image

.github/workflows/release.yml

@@ -0,0 +1,50 @@
+name: Release
+
+on:
+  workflow_dispatch:
+    inputs:
+      image_tag: 
+        type: string
+        description: "image_tag"
+        required: true
+        default: ""
+
+  push:
+
+permissions:
+  contents: read
+  packages: write
+
+jobs:
+  build-image:
+    runs-on: ubuntu-latest
+    name: plugin/helm-charts image
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: kloudlite/actions/setup-cache-go@v1
+        with:
+          cache_key: "run-${{ matrix.platform }}-${{ matrix.arch }}"
+          working_directory: .
+
+      - uses: kloudlite/actions/generate-image-tag@v1
+
+      - uses: kloudlite/actions/setup-nix-cachix@v1
+        with:
+          flake_lock: "./flake.lock"
+          nix_develop_arguments: ".#default"
+          cachix_cache_name: ${{ secrets.CACHIX_CACHE_NAME }}
+          cachix_auth_token:  ${{ secrets.CACHIX_AUTH_TOKEN }}
+
+      - uses: kloudlite/actions/setup-docker@v1
+        with:
+          docker_registry: "ghcr.io"
+          docker_username: ${{ secrets.DOCKER_USERNAME }}
+          docker_password: ${{ secrets.DOCKER_PASSWORD }}
+
+      - name: Build Binary
+        shell: bash
+        env:
+          IMAGE: "ghcr.io/${{ github.repository }}:$IMAGE_TAG"
+        run: |+
+          run build image=$IMAGE