Add container for libvirt

.github/workflows/build-qemu-app.yml

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+name: Build and Push Qemu App Toolbox
+on:
+  pull_request:
+  merge_group:
+  workflow_dispatch:
+permissions: {}
+
+env:
+    IMAGE_NAME: qemu-box
+    IMAGE_TAGS: latest
+    IMAGE_REGISTRY: ghcr.io/${{ github.repository_owner }}
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref || github.run_id }}
+  cancel-in-progress: true
+
+jobs:
+  push-ghcr:
+    name: Build and push image
+    runs-on: ubuntu-24.04
+    permissions:
+      contents: read
+      packages: write
+      id-token: write
+    strategy:
+      fail-fast: false
+    steps:
+      # Checkout push-to-registry action GitHub repository
+      - name: Checkout Push to Registry action
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+      - name: Verify Ublue-OS Ubuntu toolbox
+        uses: EyeCantCU/cosign-action/verify@58722a084c82190b57863002d494c91eabbe9e79 # v0.3.0
+        with:
+          containers: ubuntu-toolbox:latest
+          pubkey: https://raw.githubusercontent.com/ublue-os/toolboxes/main/cosign.pub
+          registry: ghcr.io/ublue-os
+
+      # Build metadata
+      - name: Image Metadata
+        uses: docker/metadata-action@030e881283bb7a6894de51c315a6bfe6a94e05cf # v6.0.0
+        id: meta
+        with:
+          images: |
+            ${{ env.IMAGE_NAME }}
+          labels: |
+            io.artifacthub.package.readme-url=https://raw.githubusercontent.com/ublue-os/boxkit/main/README.md
+
+      # Build image using Buildah action
+      - name: Build Image
+        id: build_image
+        uses: redhat-actions/buildah-build@7a95fa7ee0f02d552a32753e7414641a04307056 # v2
+        with:
+          containerfiles: |
+            ./apps/qemu/Containerfile.qemu
+          image: ${{ env.IMAGE_NAME }}
+          tags: ${{ env.IMAGE_TAGS }}
+          labels: ${{ steps.meta.outputs.labels }}
+          oci: false
+
+      # Workaround bug where capital letters in your GitHub username make it impossible to push to GHCR.
+      # https://github.com/macbre/push-to-ghcr/issues/12
+      - name: Lowercase Registry
+        id: registry_case
+        uses: ASzc/change-string-case-action@d0603cd0a7dd490be678164909f65c7737470a7f # v6
+        with:
+          string: ${{ env.IMAGE_REGISTRY }}
+
+      # Push the image to GHCR (Image Registry)
+      - name: Push To GHCR
+        uses: redhat-actions/push-to-registry@5ed88d269cf581ea9ef6dd6806d01562096bee9c # v2
+        if: github.event_name != 'pull_request'
+        id: push
+        env:
+          REGISTRY_USER: ${{ github.actor }}
+          REGISTRY_PASSWORD: ${{ github.token }}
+        with:
+          image: ${{ steps.build_image.outputs.image }}
+          tags: ${{ steps.build_image.outputs.tags }}
+          registry: ${{ steps.registry_case.outputs.lowercase }}
+          username: ${{ env.REGISTRY_USER }}
+          password: ${{ env.REGISTRY_PASSWORD }}
+          extra-args: |
+            --compression-format=zstd:chunked
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@b45d80f862d83dbcd57f89517bcf500b2ab88fb2 # v4.0.0
+        if: github.event_name != 'pull_request'
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      # Sign container
+      - uses: sigstore/cosign-installer@ba7bc0a3fef59531c69a25acd34668d6d3fe6f22 # v4.1.0
+        if: github.event_name != 'pull_request'
+        with:
+          cosign-release: "v2.6.1"
+
+      - name: Sign container image
+        if: github.event_name != 'pull_request'
+        run: |
+          echo "${{ env.COSIGN_PRIVATE_KEY }}" > cosign.key
+          wc -c cosign.key
+          cosign sign -y --key cosign.key ${{ steps.registry_case.outputs.lowercase }}/${{ env.IMAGE_NAME }}@${TAGS}
+        env:
+          TAGS: ${{ steps.push.outputs.digest }}
+          COSIGN_EXPERIMENTAL: false
+          COSIGN_PRIVATE_KEY: ${{ secrets.SIGNING_SECRET }}
+
+      - name: Echo outputs
+        env:
+          BUILD_IMAGE_OUTPUTS: ${{ toJSON(steps.build_image.outputs) }}
+        run: |
+          echo "$BUILD_IMAGE_OUTPUTS"

apps/qemu/Containerfile.qemu

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+FROM ubuntu:resolute
+
+RUN apt-get update && apt-get install -y \
+    qemu-system-x86 \
+    qemu-system-arm \
+    qemu-system-riscv \
+    qemu-system-modules-opengl \
+    qemu-system-modules-spice \
+    qemu-system-misc \
+    swtpm \
+    libvirt-daemon-system \
+    libvirt-clients \
+    libegl1
+
+RUN rm -f /etc/libvirt/qemu/networks/autostart/default.xml && \
+    rm -f /etc/libvirt/qemu/networks/default.xml
+
+RUN echo 'user = "root"' >> /etc/libvirt/qemu.conf && \
+    echo 'group = "root"' >> /etc/libvirt/qemu.conf && \
+    echo 'swtpm_user = "root"' >> /etc/libvirt/qemu.conf && \
+    echo 'swtpm_group = "root"' >> /etc/libvirt/qemu.conf
+
+RUN echo 'unix_sock_group = "root"' >> /etc/libvirt/libvirtd.conf && \
+    echo 'unix_sock_rw_perms = "0770"' >> /etc/libvirt/libvirtd.conf