update README.md

Author: mikhail-klimko

README.md

@@ -0,0 +1,20 @@
+## codefresh-onprem-helm
+
+This repository contains the Helm chart for Codefresh On-Prem installation.
+
+### How-to create on-prem patch release:
+
+- Checkout from the corresponding `release-<MAJOR>.<MINOR>` branch
+```shell
+git checkout -b onprem-X.Y.Z release-X.Y
+```
+- Update `.version` in Chart.yaml
+- Update `artifacthub.io/changes` annotation in Chart.yaml
+- [optional] Update `dependencies` in Chart.yaml
+- [optional] Update `values.yaml`, `templates/**`, etc with required changes
+- Run `helm dep update` to update dependencies
+- [optional] Run `./codefresh/.ci/runtime-images.sh` 
+- Run `./codefresh/.ci/helm-docs.sh`
+- Commit changes and open the PR against the corresponding `release-<MAJOR>.<MINOR>` branch
+- Comment `/test` to trigger CI pipeline
+- Merge the PR after successful CI build