Create RELEASE_README.md

RELEASE_README.md

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+# Release Readme
+
+## Who can do it
+
+Maintainers or above can create releases.
+
+Pleas make sure to properly use the version numbers according to [these standards](https://semver.org/#:~:text=A%20normal%20version%20number%20MUST,0%20%2D%3E%201.11.0.).
+
+## How to do it
+
+These are the steps to follow to make a new release of this package, in this order. Of course, you have to make sure that all CI tests are passing that you have also manually tested that everything works.
+
+### Step 1: 
+
+Change the version in the [pyproject.toml](./pyproject.toml) file
+
+### Step 2:
+
+Draft a new release [here](https://github.com/giotto-ai/pipeline-tools/releases/new). Feel free to fill it in with the aoutomated button. 
+
+In the release view, create a new tag called `vX.y.Z`, with `X`, `Y`, and `Z` the major, minor and patch version.
+Leave the main ranch as target.
+
+Once you are done, please make sure to click on the "Save draft". Do not publish yet!
+
+### Step 3:
+
+Run this [action job](https://github.com/giotto-ai/pipeline-tools/actions/workflows/python-publish.yml) manually, by clicking the "Run workflow" button on the top right. 
+This job, if successful, will deploy the package to `pypi` directly. You can check it online and `pip install` it.
+
+If the job fails, it means that there are probably issues in packaging and building the project: analyse the CI and fix all that is needed.
+
+### Step 4:
+
+Once published on pypi via the action job of the previous step, complete, if needed, the new release you saved as draft at step 2. 
+
+Once you are happy with the text, publish it (click the green button)!
+