add github workflows

.github/workflows/docker-image.yml

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+name: Make Docker Images
+
+on:
+  push:
+    tags:
+      - '*'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - image: henrygd/beszel
+            context: hub
+          - image: henrygd/beszel-agent
+            context: agent
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Docker metadata
+        id: metadata
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ matrix.image }}
+          tags: |
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=raw,value={{sha}},enable=${{ github.ref_type != 'tag' }}
+
+      # https://github.com/docker/login-action
+      - name: Login to Docker Hub
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      # Build and push Docker image with Buildx (don't push on PR)
+      # https://github.com/docker/build-push-action
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v5
+        with:
+          context: '{{defaultContext}}:${{ matrix.context }}'
+          file: ${{ matrix.dockerfile }}
+          platforms: linux/amd64,linux/arm64
+          push: ${{ github.ref_type == 'tag' }}
+          tags: ${{ steps.metadata.outputs.tags }}
+          labels: ${{ steps.metadata.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha

.github/workflows/goreleaser-action.yml

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+name: goreleaser
+
+on:
+  push:
+    tags:
+      - '*'
+
+permissions:
+  contents: write
+
+jobs:
+  goreleaser:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: '^1.22.1'
+      - name: GoReleaser beszel
+        uses: goreleaser/goreleaser-action@v6
+        with:
+          workdir: ./beszel
+          distribution: goreleaser
+          version: latest
+          args: release --clean
+        env:
+          GITHUB_TOKEN: ${{ secrets.TOKEN }}
+      - name: GoReleaser beszel-agent
+        uses: goreleaser/goreleaser-action@v6
+        with:
+          workdir: ./beszel-agent
+          distribution: goreleaser
+          version: latest
+          args: release --clean
+        env:
+          GITHUB_TOKEN: ${{ secrets.TOKEN }}