Add Dockerfile and CI for container image builds (#15)

* Add Dockerfile and CI for container image builds

* Fix SHA tag format in Docker workflow

The prefix={{branch}} template resolves empty on PRs, producing
an invalid tag like ":-949cd9f". Use the default sha prefix instead.

* Include README.md in Docker build context

Hatchling validates readme = "README.md" from pyproject.toml
during build. The *.md exclusion in .dockerignore was removing it.

* Update .dockerignore

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update Dockerfile

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update Dockerfile

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: ian-flores

.dockerignore

@@ -0,0 +1,11 @@
+.git
+.github
+.vscode
+*.md
+!README.md
+plans/
+selftests/
+examples/
+.gitignore
+.gitattributes
+vip.toml

.github/workflows/docker.yml

@@ -0,0 +1,59 @@
+name: Build and Push Container Image
+
+on:
+  push:
+    branches:
+      - main
+    tags:
+      - 'v*'
+  pull_request:
+    branches:
+      - main
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: posit-dev/vip
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to GitHub Container Registry
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          tags: |
+            type=raw,value=latest,enable={{is_default_branch}}
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=semver,pattern={{major}}
+            type=sha
+
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max

Dockerfile

@@ -0,0 +1,33 @@
+# VIP - Verified Installation of Posit
+# Container image for running VIP tests as Kubernetes Jobs
+FROM mcr.microsoft.com/playwright/python:v1.52.0-noble
+
+# Install uv for fast Python package management
+COPY --from=ghcr.io/astral-sh/uv:latest /uv /uvx /usr/local/bin/
+
+WORKDIR /app
+
+# Copy dependency files first for layer caching
+COPY pyproject.toml uv.lock ./
+
+# Install dependencies (without the project itself yet)
+RUN uv sync --frozen --no-install-project
+
+# Copy the full project
+COPY . .
+
+# Install the project itself
+RUN uv sync --frozen
+
+# Install playwright browsers (chromium is already in the base image, but ensure deps)
+RUN uv run playwright install --with-deps chromium
+
+# Run as the existing non-root user from the base image (ubuntu, UID 1000)
+RUN chown -R ubuntu:ubuntu /app
+USER ubuntu
+# Default entrypoint runs pytest
+# Config file should be mounted at /app/vip.toml
+ENTRYPOINT ["uv", "run", "pytest"]
+
+# Default args: run all tests with short tracebacks and verbose output
+CMD ["--tb=short", "-v"]