Add action.yml and Dockerfile

.dockerignore

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+**/__pycache__
+**/.classpath
+**/.dockerignore
+**/.env
+**/.git
+**/.gitignore
+**/.project
+**/.settings
+**/.toolstarget
+**/.vs
+**/.vscode
+**/*.*proj.user
+**/*.dbmdl
+**/*.jfm
+**/azds.yaml
+**/bin
+**/charts
+**/docker-compose*
+**/Dockerfile*
+**/node_modules
+**/npm-debug.log
+**/obj
+**/secrets.dev.yaml
+**/values.dev.yaml
+README.md
+tests

Dockerfile

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+# For more information, please refer to https://aka.ms/vscode-docker-python
+FROM python:3.8-slim
+
+# Keeps Python from generating .pyc files in the container
+ENV PYTHONDONTWRITEBYTECODE 1
+
+# Turns off buffering for easier container logging
+ENV PYTHONUNBUFFERED 1
+
+WORKDIR /app
+
+COPY pyproject.toml .
+COPY poetry.lock .
+RUN python -m pip install poetry
+RUN poetry config virtualenvs.create false
+RUN poetry install --no-interaction --no-ansi --no-dev
+
+ADD release_often .
+
+# During debugging, this entry point will be overridden. For more information, refer to https://aka.ms/vscode-docker-python-debug
+CMD ["python", "-m", "release_often"]

action.yml

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+name: 'release-often'
+author: 'Brett Cannon'
+description: ''
+inputs:
+    changelog-path:
+        description: 'Relative path to the changelog file'
+        required: true
+    pypi-token:
+        description: 'API token for PyPI uploading'
+        required: false
+        default: '-'
+    github-token:
+        description: 'GitHub token for creating releases'
+        required: true
+runs:
+    using: 'docker'
+    image: 'Dockerfile'
+    args: ['--changelog-path', '${{ inputs.changelog-path }}']