add readme

README.md

@@ -0,0 +1,27 @@
+# README
+
+## start Angular development server
+```
+cd pdb-js
+build/npm/npm-v6.14.5/bin/npm run ng serve
+```
+or 
+
+```
+gradlew npm_run_serve
+```
+
+## create new component
+
+```
+cd pdb-js
+build/npm/npm-v6.14.5/bin/npm run ng generate component component-name
+```
+
+## update JavaScript libraries
+
+```
+gradlew npm_update
+gradlew npm_audit_fix
+```
+