Updated README file

README.md

     Then extract it and open in command prompt
     run: npm install
     run: npm start
-After it you can open BlackRock.Reporting.API project in command prompt
+PDFEngine module must be linked to PDFEngineAPI
+    In PDFEngine module project terminal type npm link
+    In BlackRock.Reporting.API project terminal type npm link PDFEngine
+After it you can open BlackRock.Reporting.API project in terminal
+    run: npm install
     run: dotnet run and open https link
 
 # NOTE: you must install .NET 6 SDK before starting API