Fix broken npm + update readme

SAS/TMSS/frontend/tmss_webapp/README.md

@@ -88,6 +88,18 @@ npm install
 npm start
 ```
 
+### npm version fixing on main branche directly (Superb mode)
+```
+cd <you_lofar_source_tree_root>/SAS/TMSS/frontend/tmss_webapp
+rm -r -f  node_modules folder
+rm -f package-lock.json
+npm install
+```
+then to verify
+```
+npm ci 
+```
+Then check it in
 ### Available Scripts
 
 Run npm install command to download and install all required modules/packages into node_modules folder.