Added GitHub Actions workflow (#1)

.github/workflows/pr_validation.yaml

@@ -0,0 +1,32 @@
+name: PR Validation
+
+on:
+  pull_request:
+    branches:
+      - dev
+  push:
+    branches:
+      - dev
+
+jobs:
+  build-and-test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Build Docker image
+        run: |
+          docker build -t petabridge/pbm-sidecar:pr-validation .
+
+      - name: Run Docker container and test
+        run: |
+          docker run --rm petabridge/pbm-sidecar:pr-validation pbm help
+
+      - name: Cleanup Docker images
+        run: |
+          docker rmi petabridge/pbm-sidecar:pr-validation || true

Dockerfile

@@ -0,0 +1,18 @@
+FROM mcr.microsoft.com/dotnet/sdk:8.0 AS base
+WORKDIR /app
+
+# Install Petabridge.Cmd client so it can be invoked remotely via
+# Docker or K8s 'exec` commands
+RUN dotnet tool install --global pbm
+
+FROM mcr.microsoft.com/dotnet/runtime:8.0 AS app
+WORKDIR /app
+
+# copy .NET Core global tool
+COPY --from=base /root/.dotnet /root/.dotnet/
+
+# Needed because https://stackoverflow.com/questions/51977474/install-dotnet-core-tool-dockerfile
+ENV PATH="${PATH}:/root/.dotnet/tools"
+
+# Set the entrypoint to keep the container running
+ENTRYPOINT ["tail", "-f", "/dev/null"]