Add monitoring dev doc

support/doc/development/monitoring.md

@@ -0,0 +1,17 @@
+# Monitoring
+
+## Client modules
+
+To open a report of client build:
+
+```
+$ npm run build -- --analyze-bundle && npm run client-report
+```
+
+## API benchmark
+
+To benchmark the REST API and save result in `benchmark.json`:
+
+```
+$ node dist/scripts/benchmark.js benchmark.json
+```