feat: set up dockerfile (#87)

Fixes #8

Author: afuetterer

.dockerignore

@@ -0,0 +1 @@
+**/__pycache__

.github/workflows/test.yml

@@ -98,3 +98,23 @@ jobs:
     steps:
     - uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29 # v4.1.6
     - uses: hynek/build-and-inspect-python-package@b4fc3f6ba2b3da04f09659be99e2a29fb6146a61 # v2.6.0
+
+  docker:
+    name: Build and run the docker image
+    runs-on: ubuntu-24.04
+    env:
+      NO_COLOR: 1
+    steps:
+    - uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29 # v4.1.6
+    - run: pipx install hatch
+    - name: Get package version
+      id: package-version
+      run: echo "version=$(hatch version)" >> $GITHUB_OUTPUT
+    - uses: docker/setup-buildx-action@d70bba72b1f3fd22344832f00baa16ece964efeb # v3.3.0
+    - name: Build and push
+      uses: docker/build-push-action@2cdde995de11925a030ce8070c3d77a52ffcf1c0 # v5.3.0
+      with:
+        load: true
+        tags: afuetterer/python-re3data:test
+        build-args: VERSION=${{ steps.package-version.outputs.version }}
+    - run: docker run --rm afuetterer/python-re3data:test --help

Dockerfile

@@ -0,0 +1,43 @@
+# syntax=docker/dockerfile:1
+
+# base
+# ----------------------------
+FROM python:3.12-slim as base
+
+ENV PYTHONDONTWRITEBYTECODE=1 \
+    PYTHONUNBUFFERED=1 \
+    PIP_DISABLE_PIP_VERSION_CHECK=1 \
+    PIP_NO_CACHE_DIR=1 \
+    PIP_ROOT_USER_ACTION=ignore
+
+# build stage
+# ----------------------------
+FROM base as build
+
+WORKDIR /app
+
+RUN python -m pip install build
+
+COPY pyproject.toml .
+COPY README.md .
+COPY src ./src
+
+RUN python -m build --wheel
+
+# runtime stage
+# ----------------------------
+FROM base as runtime
+
+ARG VERSION
+
+RUN adduser --group --system --no-create-home re3data
+
+WORKDIR /app
+
+COPY --from=build /app/dist ./dist
+
+RUN python -m pip install "./dist/python_re3data-$VERSION-py3-none-any.whl[cli]"
+
+USER re3data
+
+ENTRYPOINT ["re3data"]