Create RELEASE.md

RELEASE.md

@@ -0,0 +1,40 @@
+# How to release
+
+A short primer in the steps needed to release a new version of the `weldx` package
+
+## create release PR
+
+- [ ] create a PR that finalizes the code for the next version
+    - [ ] name the PR according to the version `vX.Y.Z` and add the `release` tag ([example here](https://github.com/BAMWelDX/weldx/pull/419))
+    - [ ] make sure `CHANGELOG.md` is up to date and enter current date to the release version
+    - [ ] add summarized release highlights where appropriate
+    - [ ] update the `CITATION.cff` version number and date
+- [ ] wait for review and the CI jobs to finish
+- [ ] check the readthedocs PR build
+
+## Merge the Pull Request
+
+- [ ] merge normally and wait for all CI actions to finish on the main branch
+
+## add Git(hub) tag
+
+- [ ] tag and release the current master version on GitHub using the **Releases** feature
+    - [ ] name the release **git tag** according to the version released (e.g. **v0.3.3**)
+    - [ ] name the GitHub release accordingly, omitting the **v** prefix (this can be change later so don't worry, in doubt
+      use **vX.Y.Z** everywhere)
+    - [ ] copy the changes/release notes of the current version into the description
+- [ ] wait for all Github Actions to finish
+
+## ReadTheDocs update
+
+- [ ] check the build processes for `latest`, `stable` and `vX.Y.Z` get triggered on RTD (the tag build can get triggered twice, resulting in a failed/duplicated build, no need to worry)
+
+## pypi release
+
+- [ ] check the automatic release to pypi after the `build` action completes [here](https://pypi.org/project/weldx/)
+
+## conda-forge release
+
+- pypi release should get picked up by the conda-forge bot and create the new pull-request [here](https://github.com/conda-forge/weldx-feedstock/pulls)
+- [ ] carefully check the `meta.yaml` in the pull request, manually update all changes in the build and run dependencies
+- [ ] merge with 2 or more approved reviews