diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
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--- /dev/null
+++ b/CONTRIBUTING.md
@@ -0,0 +1,24 @@
+# How to setup development environment
+- Install poetry: https://python-poetry.org/docs/#installation
+- (Optional) Install pre-commit: https://pre-commit.com/#install
+- Run `poetry install` to install dependencies
+- Run `pre-commit install` to install pre-commit hooks
+
+# How to run tests
+- Run `poetry run pytest`
+- or run `tox`
+# How to make a release
+
+```shell
+python -m pip install --upgrade build twine
+
+# cleanup the ./dist folder
+rm -rf ./dist
+
+# Build the distributions
+python -m build
+
+# Upload them
+
+twine upload dist/*
+```
diff --git a/RELEASING.md b/RELEASING.md
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--- a/RELEASING.md
+++ /dev/null
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-# How to make a release
-
-```shell
-python -m pip install --upgrade build twine
-
-# cleanup the ./dist folder
-rm -rf ./dist
-
-# Build the distributions
-python -m build
-
-# Upload them
-
-twine upload dist/*
-```