build and push dotnet-auto-instrumentation image

.github/workflows/publish-autoinstrumentation-dotnet.yaml

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+name: "Publish DotNet Auto-Instrumentation"
+
+on:
+  push:
+    paths:
+      - 'autoinstrumentation/dotnet/**'
+      - '.github/workflows/publish-autoinstrumentation-dotnet.yaml'
+    branches:
+      - main
+  pull_request:
+    paths:
+      - 'autoinstrumentation/dotnet/**'
+      - '.github/workflows/publish-autoinstrumentation-dotnet.yaml'
+  workflow_dispatch:
+
+jobs:
+  publish:
+    runs-on: ubuntu-20.04
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Read version
+        run: echo "VERSION=$(cat autoinstrumentation/dotnet/version.txt)" >> $GITHUB_ENV
+
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v4.0.1
+        with:
+          images: ghcr.io/open-telemetry/opentelemetry-operator/autoinstrumentation-dotnet
+          tags: |
+            type=match,pattern=v(.*),group=1,value=v${{ env.VERSION }}
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2.0.0
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2.0.0
+
+      - name: Cache Docker layers
+        uses: actions/cache@v3
+        with:
+          path: /tmp/.buildx-cache
+          key: ${{ runner.os }}-buildx-${{ github.sha }}
+          restore-keys: |
+            ${{ runner.os }}-buildx-
+
+      - name: Login to GitHub Package Registry
+        uses: docker/login-action@v2.0.0
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and push
+        uses: docker/build-push-action@v3.0.0
+        with:
+          context: autoinstrumentation/dotnet
+          platforms: linux/amd64,linux/arm64
+          push: ${{ github.event_name == 'push' }}
+          build-args: version=${{ env.VERSION }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=local,src=/tmp/.buildx-cache
+          cache-to: type=local,dest=/tmp/.buildx-cache

autoinstrumentation/dotnet/Dockerfile

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+# To build one auto-instrumentation image for dotnet, please:
+#  - Download your dotnet auto-instrumentation artefacts to `/autoinstrumentation` directory. This is required as when instrumenting the pod,
+#    one init container will be created to copy the files to your app's container.
+#  - Grant the necessary access to the files in the `/autoinstrumentation` directory.
+#  - Following environment variables are injected to the application container to enable the auto-instrumentation.
+#    DOTNET_ADDITIONAL_DEPS=%InstallationLocation%/AdditionalDeps
+#    DOTNET_SHARED_STORE=%InstallationLocation%/store
+#    DOTNET_STARTUP_HOOKS=%InstallationLocation%/netcoreapp3.1/OpenTelemetry.AutoInstrumentation.StartupHook.dll 
+
+FROM busybox
+
+ARG version
+
+WORKDIR /autoinstrumentation
+
+ADD https://github.com/open-telemetry/opentelemetry-dotnet-instrumentation/releases/download/v$version/opentelemetry-dotnet-instrumentation-linux-glibc.zip .
+
+RUN unzip opentelemetry-dotnet-instrumentation-linux-glibc.zip
+
+RUN chmod -R go+r .

autoinstrumentation/dotnet/version.txt

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+0.2.0-beta.1