docs: Include tips for running alongside Test Suite when maintaining

CONTRIBUTING.md

@@ -9,3 +9,42 @@ Please note we have a [code of conduct](https://openactive.io/public-openactive-
 Note that to set up a development environment for this project on a Mac, you will need:
 - Visual Studio for Mac, selecting only .NET Core features on setup - [Download](https://visualstudio.microsoft.com/vs/mac/)
 - .NET Core SDK 2.1.808 installer for Mac - [Download](https://dotnet.microsoft.com/download/dotnet-core/2.1)
+
+## Test Suite
+
+[**OpenActive Test Suite**](https://github.com/openactive/openactive-test-suite) is a suite of tests that can verify the conformance of an Open Booking API implementation, such as the **reference implementation** ([BookingSystem.AspNetCore](./Examples/BookingSystem.AspNetCore/)) contained within this project. OpenActive.Server.NET's CI checks that Test Suite passes for its reference implementation.
+
+## Pull Request Process
+
+Changes to [OpenActive.Server.Net](.) should be tested with the [Test Suite](#test-suite) before a Pull Request is submitted, to ensure that the reference implementation remains conformant. If changes are also required to Test Suite in order to properly test the new changes, then `coverage/*` branches should be used for both repositories, as documented in Test Suite's [Pull Request Process](https://github.com/openactive/openactive-test-suite/blob/master/CONTRIBUTING.md#pull-request-process) documentation.
+
+## Locally running the reference implementation in order to run Test Suite
+
+When you are making changes to [OpenActive.Server.NET](.), please run the **reference implementation** ([BookingSystem.AspNetCore](./Examples/BookingSystem.AspNetCore/)) and [Test Suite](#test-suite) on your machine to check that the changes work before submitting a [pull request](#pull-request-process).
+
+How to run them both locally, using the `dotnet` CLI:
+
+* **Reference Implementation**. Run the [reference implementation's IdentityServer](./Examples/BookingSystem.AspNetCore.IdentityServer/) and the [reference implementation itself](./Examples/BookingSystem.AspNetCore/).
+    1. Run the IdentityServer:
+        ```sh
+        cd ./Examples/BookingSystem.AspNetCore.IdentityServer/
+        dotnet run
+        ```
+    2. Run the reference implementation (See [**Optimizing for controlled mode**](#optimizing-for-controlled-mode) for a quicker way to run this):
+        ```sh
+        cd ./Examples/BookingSystem.AspNetCore/
+        dotnet run
+        ```
+* **Test Suite**: To run this locally, follow the guidelines in its [project's contribution documentation](https://github.com/openactive/openactive-test-suite/blob/master/CONTRIBUTING.md).
+
+### Optimizing for controlled mode
+
+To speed up your development/testing feedback loop, you can optimize the reference implementation for [**controlled mode**](https://developer.openactive.io/open-booking-api/key-decisions#controlled-mode). In this mode, Test Suite creates all the data that it needs for testing. Test Suite is set to use this mode by default when running locally. With this mode, the reference implementation does not need to generate its own data, which it does by default, and so it will start up more quickly.
+
+To do this, run reference implementation like this:
+
+```sh
+cd ./Examples/BookingSystem.AspNetCore/
+export OPPORTUNITY_COUNT=1
+dotnet run
+```

Examples/BookingSystem.AspNetCore/README.md

@@ -4,14 +4,6 @@ An example OpenActive.Server.NET implementation.
 
 This implementation is also used as a reference implementation for the [Test Suite](https://github.com/openactive/openactive-test-suite) to run its tests against.
 
-## Running Locally for the 1st time
+## Running Locally
 
-1. In Visual Studio, run the BookingSystem.AspNetCore project
-
-    When it's finished building, it will open a page in your browser with a randomly assigned port e.g. http://localhost:55603/. Make note of this port.
-
-    Head to `http://localhost:{PORT}/openactive` to check that the project is running correctly. You should see an Open Data landing page.
-2. Head to BookingSystem.AspNetCore project options and add an env var using the port you made note of earlier:
-
-    `ApplicationHostBaseUrl: http://localhost:{PORT}`
-3. Now, re-run the project. You're good to go 👍
+See the [project contribution documentation](/CONTRIBUTING.md) for details on how to run BookingSystem.AspNetCore locally.