ci(release): 🏗️ add build and deploy workflow to ghcr

Triggers on tag pushes (v*) or manual dispatch. Builds and pushes Docker image with semver, major.minor, major, sha, and latest tags. Validates semver and uses dynamic metadata for labels.

Author: tmeckel

.github/workflows/build-and-deploy.yml

@@ -0,0 +1,62 @@
+name: Build and Deploy to GitHub Registry
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+  workflow_dispatch:
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ophiosdev/opencode-cli
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out the repo
+        id: checkout
+        uses: actions/checkout@v5
+
+      - name: Get the version
+        id: get_version
+        run: echo "VERSION=${GITHUB_REF#refs/tags/v}" >> "$GITHUB_OUTPUT"
+
+      - name: Validate Semver
+        id: semver
+        uses: matt-usurp/validate-semver@v2
+        with:
+          version: ${{ steps.get_version.outputs.VERSION }}
+
+      - name: Log in to the Container registry
+        id: login_registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          tags: |
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=semver,pattern={{major}}
+            type=sha
+            type=raw,value=latest,enable={{is_default_branch}}
+          labels: |
+            org.opencontainers.image.maintainer=Ophios GmbH
+      - name: Build and push Docker image
+        id: build_and_push
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          build-args: |
+            OPENCODE_VERSION=${{ steps.get_version.outputs.VERSION }}