release: build multi-arch docker image

.github/workflows/build.yml

@@ -268,6 +268,10 @@ jobs:
     needs: [build]
     runs-on: ubuntu-24.04
     steps:
+      - name: Check out
+        uses: actions/checkout@v4
+      - name: Setup buildx
+        uses: docker/setup-buildx-action@v3
       - name: Download artifacts
         uses: actions/download-artifact@v4
       - name: Create assets
@@ -305,3 +309,6 @@ jobs:
           prerelease: true
           draft: false
           tag: ${{ env.RELEASE_VERSION }}
+      - name: Build and push container image
+        run: |
+          docker buildx build -f Dockerfile.release --platform linux/amd64,linux/arm64 -t ghcr.io/datadog/otel-profiling-agent:${{ env.RELEASE_VERSION }} .

Dockerfile.release

@@ -0,0 +1,18 @@
+FROM ubuntu:24.04
+
+USER root
+
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends binutils curl sudo ca-certificates
+
+COPY agent-* sha256sums.txt /tmp/
+
+RUN sha256sum -c /tmp/sha256sums.txt \
+    && mv /tmp/agent-$(uname -p) /usr/local/bin/otel-profiling-agent \
+    && chmod +x /usr/local/bin/otel-profiling-agent \
+    && rm -rf /tmp/agent*
+
+RUN apt-get clean && \
+    rm -rf /var/lib/apt/lists/*
+
+CMD ["/bin/sh", "-c", "sudo -E /usr/local/bin/otel-profiling-agent"]