Add contributing guide

CONTRIBUTING.md

@@ -0,0 +1,28 @@
+# Contributing
+
+Feel free to get involved in the project by opening issues, or submitting pull requests.
+
+
+## Build & Release Process
+
+Builds and releases managed with github actions.
+
+### Build
+
+* Local builds are as simple as `dotnet build && dotnet test`
+* CI builds on every push
+* [.github/workflows/ci.yaml](./.github/workflows/ci.yaml)
+* Build and tests MUST pass before merging to master
+
+
+### Release
+
+* Locally, packages can be created using `dotnet pack ./src/Saunter/Saunter.csproj`
+* Release packages are built from github actions
+* [.github/workflows/release.yaml](./.github/workflows/release.yaml)
+* Pushing a tag formatted as `v*.*.*` will trigger the release workflow
+* Releases MUST use semantic versioning
+* Tags for release (non-preproduction) should relate to commits on `master`
+* The repository owner is responsible for tagging and releasing
+* Packages are pushed to [nuget.org/packages/saunter](https://www.nuget.org/packages/saunter)
+

README.md

@@ -90,8 +90,9 @@ See [examples/StreetlightsAPI](examples/StreetlightsAPI).
 
 ## Contributing
 
-Feel free to get involved in the project by opening issues, or submitting pull requests.
+See our [contributing guide](./CONTRIBUTING.md).
 
+Feel free to get involved in the project by opening issues, or submitting pull requests.
 
 ## Thanks