chore: adding "how to contribute"

chore: adding files to modules

chore: adding files to modules

chore: adding files to modules

chore: adding files to modules

chore: adding files to modules

chore: adding files to modules

chore: adding files to modules

chore: adding "how to contribute"

chore: adding files to modules

chore: adding files to modules

chore: adding files to modules

chore: adding files to modules

chore: adding files to modules

chore: adding files to modules

chore: adding files to modules

Author: florianow

README.md

@@ -50,3 +50,106 @@ Refer to each module's README.md for specific usage instructions such as needed
 
 The meshStack Hub is a 🌤️ [cloudfoundation.org community](https://cloudfoundation.org/?ref=github-collie-cli) project.
 Reach out to us on the [cloudfoundation.org slack](http://cloudfoundationorg.slack.com).
+
+## 🛠️ How to Contribute
+
+Thank you for your interest in contributing Terraform modules or building blocks to **meshstack-hub**! To ensure high quality and consistency, please follow the steps below:
+
+---
+
+### 1. Fork & Clone
+
+```bash
+git clone [email protected]:<your-username>/meshstack-hub.git
+cd meshstack-hub
+git checkout -b feature/your-module
+```
+
+---
+
+### 2. Enter Nix Development Shell
+
+The repository provides a `flake.nix` that includes pre-commit hooks, formatting, validation, and docs generation:
+
+```bash
+nix develop
+```
+
+This prepares the environment with `terraform`, `terraform-docs`, `pre-commit`, and any other needed tools automatically.
+
+---
+
+### 3. Write and Organize Your Terraform Module
+
+- Add your module under the correct provider folder (e.g. `aws/`, `azure/`, `gcp/`).
+- Include:
+  - `main.tf`, `variables.tf`, `outputs.tf`, `versions.tf`, `providers.tf`, `APP_TEAM_README.md`
+  - A `README.md` describing the module’s purpose and usage.
+
+---
+
+### 4. Run Pre‑commit Hooks
+
+Hooks are already available in your shell:
+
+```bash
+pre-commit run --all-files
+```
+
+They include checks like `terraform fmt`, `terraform validate` and automated docs via `terraform-docs`.
+
+Commiting will auto-run them:
+
+```bash
+git add .
+git commit -m "feat(aws/vpc): add new vpc module"
+```
+
+---
+
+This is typically triggered via pre-commit hooks during commits.
+
+---
+
+### 7. Add or Update Tests
+
+- Run them inside `nix develop`, for example:
+
+Ensure all tests pass and code/formats stay clean.
+
+---
+
+### 8. Push & Open a Pull Request
+
+```bash
+git push origin feature/your-module
+```
+
+In your PR description include:
+- Module purpose, inputs/outputs
+- Provider details
+- Any breaking changes or migration notes
+- Confirmation that all tests and checks passed
+
+---
+
+### 9. Review & Merge
+
+CI will rerun all hooks/tests. A maintainer will review and merge or request adjustments.
+
+---
+
+## ✅ Summary Checklist
+
+1. [ ] Module in the correct provider folder  
+2. [ ] `main.tf`, `variables.tf`, `outputs.tf`, `README.md`  
+3. [ ] `nix develop` used to enter environment ✅  
+4. [ ] `pre-commit run --all-files` passed ✅  
+5. [ ] `terraform init`, `validate`, `fmt` passed ✅  
+6. [ ] `terraform-docs markdown .` docs generated ✅  
+7. [ ] Tests added/updated and passing ✅  
+8. [ ] PR includes description & proof that all checks passed ✅  
+
+---
+
+Thanks again for helping to improve **meshstack-hub**! 🚀