Make the contributing guidelines for fluent-operator chart more visible

Signed-off-by: Marco Franssen <marco.franssen@gmail.com>

Author: marcofranssen

CONTRIBUTING.md

@@ -48,3 +48,47 @@ See `git help commit`:
     license and agrees to a Developer Certificate of Origin (see
     http://developercertificate.org/ for more information).
 ```
+
+## How to Contribute
+
+1. Fork this repository, develop, and test your changes
+2. Remember to sign off your commits as described above
+3. Submit a pull request
+
+> [!Note]
+> In order to make testing and merging of PRs easier, please submit changes to multiple charts in separate PRs.
+
+### Fluent Operator Chart
+
+> [!Important]
+> The fluent-operator Chart is maintained in [this repository][fluent-operator-chart]. Please **do NOT submit PRs** for the fluent-operator Chart in this repository! Do all contributions in the [fluent-operator repository][fluent-operator-chart].
+
+### Technical Requirements
+
+- Must pass [DCO check](#sign-off-your-work)
+- Must follow [Charts best practices](https://helm.sh/docs/topics/chart_best_practices/)
+- Must pass CI jobs for linting and installing changed charts with the [chart-testing](https://github.com/helm/chart-testing) tool
+- Any change to a chart requires a version bump following [semver](https://semver.org/) principles. See [Immutability(#immutability) and [Versioning](#versioning) below
+
+Once changes have been merged, the release job will automatically run to package and release changed charts.
+
+### Immutability
+
+Chart releases must be immutable. Any change to a chart warrants a chart version bump even if it is only changed to the documentation.
+
+### Versioning
+
+The chart `version` should follow [semver](https://semver.org/).
+
+Charts should start at `1.0.0`. Any breaking (backwards incompatible) changes to a chart should:
+
+1. Bump the MAJOR version
+2. In the README, under a section called "Upgrading", describe the manual steps necessary to upgrade to the new (specified) MAJOR version
+
+### Community Requirements
+
+This project is released with a [Contributor Covenant](https://www.contributor-covenant.org).
+By participating in this project you agree to abide by its terms.
+See [CODE_OF_CONDUCT.md](./CODE_OF_CONDUCT.md).
+
+[fluent-operator-chart]: https://github.com/fluent/fluent-operator/tree/master/charts/fluent-operator "Sources for the fluent-operator Chart"