ci: automatic docker image building

.github/workflows/build.yml

@@ -0,0 +1,67 @@
+name: Build Image
+
+on:
+    push:
+        branches:
+            - main
+
+        tags:
+            - v*
+
+        paths:
+            - .github/workflows/build.yml
+            - '**/*.go'
+            - go.mod
+            - go.sum
+            - Dockerfile
+            - .dockerignore
+
+env:
+    FORCE_COLOR: true
+    REGISTRY: ghcr.io
+    IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+    Build:
+        runs-on: ubuntu-latest
+
+        permissions:
+            contents: read
+            packages: write
+            attestations: write
+            id-token: write
+
+        steps:
+            - uses: actions/checkout@v4
+
+            - name: Set up Buildx
+              uses: docker/setup-buildx-action@v3
+
+            - name: Log in to Registry
+              uses: docker/login-action@v3
+              with:
+                  registry: ${{ env.REGISTRY }}
+                  username: ${{ github.actor }}
+                  password: ${{ secrets.GITHUB_ACTION }}
+
+            - name: Extract metadata
+              id: meta
+              uses: docker/metadata-action@v5
+              with:
+                  images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+
+            - name: Build and push image
+              id: push
+              uses: docker/build-push-action@v6
+              with:
+                  context: .
+                  push: true
+                  tags: ${{ steps.meta.outputs.tags }}
+                  labels: ${{ steps.meta.outputs.labels }}
+
+            - name: Generate attestation
+              uses: actions/attest-build-provenance@v1
+              with:
+                  subject-name: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+                  subject-digest: ${{ steps.push.outputs.digest }}
+                  push-to-registry: true