feat(workflows): Add docker build workflow

Add docker build workflow to build and publish image
in ghcr.io.

Signed-off-by: Denys Fedoryshchenko <denys.f@collabora.com>

Author: nuclearcat

.github/workflows/docker.yaml

@@ -0,0 +1,24 @@
+on:
+  release:
+    types: [created]
+  workflow_dispatch:
+  
+name: Build docker image
+jobs:
+  build:
+    name: KernelCI Storage Docker image
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      - name: Login to ghcr.io
+        run: echo "${{ secrets.GITHUB_TOKEN }}" | docker login ghcr.io -u ${{ github.actor }} --password-stdin
+      - name: Build and push
+# running ARM64 will take a long time (1hr+), so we only build for AMD64 for now
+#        run: |
+#         docker buildx build --platform linux/amd64,linux/arm64 -t ghcr.io/nuclearcat/kernelci-storage:latest --push .
+        run: |
+         docker buildx build --platform linux/amd64 -t ghcr.io/nuclearcat/kernelci-storage:latest --push .
+      
+

Dockerfile

@@ -4,7 +4,6 @@ COPY . .
 RUN cargo install --path .
 
 FROM debian:bookworm-slim
-#RUN apt-get update && apt-get install -y extra-runtime-dependencies && rm -rf /var/lib/apt/lists/*
 RUN apt-get update && rm -rf /var/lib/apt/lists/*
 COPY --from=builder /usr/local/cargo/bin/kernelci-storage /usr/local/bin/kernelci-storage
 CMD ["kernelci-storage"]