chore: update contribution

Author: DmitryAnansky

CONTRIBUTING.md

@@ -196,6 +196,24 @@ To update snapshots, run `npm run e2e -- -u`.
 
 If you made any changes, make sure to compile the code before running the tests.
 
+### Smoke tests
+
+Smokes are for testing the CLI in different environments.
+
+To run them locally, please follow the steps described in the smoke GitHub actions: [smoke-basic](.github/workflows/smoke.yaml), [smoke-plugins](.github/workflows/smoke-plugins.yaml), [smoke-rebilly](.github/workflows/smoke-rebilly.yaml).
+
+To update smoke tests for the `build-docs` command (which sometimes fails due to external package updates), please follow the steps below:
+
+```sh
+# Build and install the current CLI build locally
+npm run compile
+npm run pack:prepare
+npm i -g redocly-cli.tgz
+
+# Re-build the docs
+(cd __tests__/smoke/ && redocly build-docs openapi.yaml -o pre-built/redoc.html)
+```
+
 ### Performance benchmark
 
 To run the performance benchmark locally, you should have `hyperfine` (v1.16.1+) installed on your machine.