Add publish workflow to publish to PyPI and GHCR

.dockerignore

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+*
+!dist/*.whl

.github/workflows/publish.yaml

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+name: Publish to PyPI and GHCR
+on:
+  push:
+    tags:
+      - v*
+jobs:
+  build-and-publish:
+    runs-on: ubuntu-latest
+    environment:
+      name: pypi
+      url: 'https://pypi.org/p/pypi-browser-webapp'
+    permissions:
+      attestations: write
+      id-token: write
+      packages: write
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+        with:
+          python-version: '3.13'
+      - name: Install dependencies
+        run: pip install build
+      - name: Build Python artifacts
+        run: python -m build --sdist --wheel --outdir dist
+      - name: Publish to PyPI
+        uses: pypa/gh-action-pypi-publish@release/v1
+        with:
+          skip-existing: true
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Retrieve wheel name
+        id: wheel
+        run: echo "WHEEL=$(ls dist/*.whl)" >> $GITHUB_OUTPUT
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          build-args: |
+            WHEEL=${{ steps.wheel.outputs.WHEEL }}
+          tags: |
+            ghcr.io/chriskuehl/pypi-browser:latest
+            ghcr.io/chriskuehl/pypi-browser:${{ github.ref_name }}
+          push: true

Dockerfile

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+FROM public.ecr.aws/docker/library/python:3.13
+RUN apt-get update && apt-get install -y dumb-init && apt-get clean
+ARG WHEEL
+COPY "$WHEEL" /tmp/
+USER nobody
+RUN python -m venv /tmp/venv
+RUN /tmp/venv/bin/pip install /tmp/*.whl uvicorn
+VOLUME /cache
+ENV PYPI_BROWSER_PACKAGE_CACHE_PATH=/cache
+CMD ["/usr/bin/dumb-init", "/tmp/venv/bin/uvicorn", "--forwarded-allow-ips=*", "--host", "0.0.0.0", "pypi_browser.app:app"]