feat: add documentation about vitest and playwright

README.md

@@ -1,3 +1,17 @@
 # Impala
 
 Impala is a module of Insee's Statistical Metadata Repository (RMéS). It exposes linked metadata on web pages and through a SPARQL editor based on [Yasgui](https://triply.cc/docs/yasgui-api).
+
+## Getting Started
+
+* Run Unit Tests (Vitest)
+
+```shell
+yarn test
+```
+
+* Run UI Tests (Playwright)
+
+```shell
+npx playwright test
+```