Create 3.7.3 action

.dockerignore

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+.git
+.github
+LICENSE
+README.md

.github/main.workflow

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+workflow "Main workflow" {
+  on = "push"
+  resolves = ["docker-build"]
+}
+
+action "docker-build" {
+  uses = "actions/docker/cli@master"
+  args = "build -t abatilo/actions-poetry ."
+}

Dockerfile

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+FROM python:3.7.3-stretch
+
+LABEL "com.github.actions.name"="poetry - Python"
+LABEL "com.github.actions.description"="GitHub Actions for Python projects using poetry"
+LABEL "com.github.actions.icon"="package"
+LABEL "com.github.actions.color"="blue"
+
+LABEL "repository"="https://github.com/abatilo/actions-poetry"
+LABEL "homepage"="https://github.com/abatilo/actions-poetry"
+LABEL "maintainer"="abatilo"
+
+RUN pip install poetry==0.12.16
+
+ENTRYPOINT [ "/usr/local/bin/poetry" ]

README.md

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 # actions-poetry
 GitHub Actions for Python projects using poetry
+
+[![license](https://img.shields.io/github/license/abatilo/actions-poetry.svg)](https://github.com/abatilo/actions-poetry/blob/master/LICENSE)
+[![release](https://img.shields.io/github/release/abatilo/actions-poetry.svg)](https://github.com/abatilo/actions-poetry/releases/latest)
+[![GitHub release date](https://img.shields.io/github/release-date/abatilo/actions-poetry.svg)](https://github.com/abatilo/actions-poetry/releases)
+
+- [sdispater/poetry: Python dependency management and packaging made easy.](https://github.com/sdispater/poetry)
+
+## Getting started
+
+| Branch | Base image             |
+| ------ | ---------------------- |
+| 3.7.3  | `python:3.7.3-stretch`   |
+
+### Create `main.workflow`
+
+```hcl
+workflow "Python workflow" {
+  on = "push"
+  resolves = ["publish"]
+}
+
+action "publish" {
+  needs = "poetry-build"
+  uses = "abatilo/actions-poetry@3.7.3"
+  args = ["publish", "--build", "--no-interaction", "-vv", "--username", "$PYPI_USERNAME", "--password", "$PYPI_PASSWORD"]
+}
+```
+
+## License
+
+[MIT License - abatilo/actions-poetry]
+
+[MIT License - abatilo/actions-poetry]: https://github.com/abatilo/actions-poetry/blob/master/LICENSE
+
+
+## About the author
+
+- [abatilo's homepage](https://www.aaronbatilo.dev/)