feat: init container image with busybox and talosctl

.github/workflows/build.yml

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+name: Build and publish container image
+
+on:
+  push:
+    branches: ["main"]
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build-and-push-image:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+      attestations: write
+      id-token: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Get changed files
+        id: changed-files
+        uses: tj-actions/changed-files@v14.1
+        with:
+          files: |
+            Dockerfile
+            .github/workflows/**/*
+
+      - name: Log in to the Container registry
+        if: steps.changed-files.outputs.any_changed == 'true'
+        uses: docker/login-action@v1
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata (tags, labels) for Docker
+        if: steps.changed-files.outputs.any_changed == 'true'
+        id: meta
+        uses: docker/metadata-action@v3
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          tags: |
+            type=sha
+
+      - name: Build and push Docker image
+        if: steps.changed-files.outputs.any_changed == 'true'
+        id: push
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          platforms: linux/amd64
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+
+      - name: Generate artifact 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

.github/workflows/release.yml

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+name: Release new version of container image
+
+on:
+  push:
+    tags: ["*"]
+  workflow_dispatch:
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build-and-push-image:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+      attestations: write
+      id-token: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 2
+
+      - name: Log in to the Container registry
+        uses: docker/login-action@v1
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@v3
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          tags: |
+            type=ref,event=tag
+            type=raw,value=latest
+            type=sha
+
+      - name: Build and push Docker image
+        id: push
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          platforms: linux/amd64
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+
+      - name: Generate artifact 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

Dockerfile

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+ARG TALOS_VERSION=latest
+FROM ghcr.io/siderolabs/talosctl:$TALOS_VERSION AS talosctl
+
+
+FROM ghcr.io/containerd/busybox:1.36
+
+LABEL maintainer="Tobias Krischer <tobias.krischer@elyxon.de>"
+
+COPY --from=talosctl /talosctl /usr/local/bin/talosctl
+VOLUME [ "/var/run/secrets/talos.dev" ]
+CMD [ "/bin/sh" ]
+

README.md

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+# Container image for talosctl based on busybox
+
+Container image based on [ghcr.io/containerd/busybox](https://github.com/containerd/containerd/pkgs/container/busybox) with talosctl.
+This image is useful for running shell scripts using talosctl (e.g. backup scripts).
+
+## How to start
+
+```sh
+podman run \
+    -v $PWD/talosconfig.yaml:/var/run/secrets/talos.dev/config \
+    ghcr.io/nimbolus/container-talosctl
+```