Add documentation build instructions to Contributing.md

Co-authored-by: 7sharp9 <[email protected]>

Author: Copilot

Contributing.md

@@ -3,6 +3,19 @@
 2. Run `dotnet tool restore` to install required local tools
 3. Run `dotnet build -c Release -t:Build`
 
+# How to build documentation:
+The documentation is built using Hugo and automatically deployed to GitHub Pages on every push to the master branch.
+
+To build the documentation locally:
+1. Install [Hugo](https://gohugo.io/getting-started/installing/) (version 0.126.3 or later)
+2. Navigate to the `docs` directory: `cd docs`
+3. Initialize the theme submodule: `git submodule update --init --recursive`
+4. Build the site: `hugo --minify`
+5. The generated site will be in the `docs/public` directory
+6. To preview locally: `hugo server` (available at http://localhost:1313/myriad/)
+
+The documentation is automatically published to https://moiraesoftware.github.io/myriad/ via GitHub Actions.
+
 # How to debug:
 - uncomment line `<!-- <MyriadSdkWaitForDebugger>true</MyriadSdkWaitForDebugger> -->` in test\Myriad.IntegrationPluginTests\Myriad.IntegrationPluginTests.fsproj
 - `dotnet build test\Myriad.IntegrationPluginTests -v n` the test project