(on windows machine) npm install node-gyp -g npm cache clean rm -rf node_modules npm install
(install mongoDb, run cmd using admin rights)
go to bin folder of mongo mongod -directoryperdb --dbpath F:\code\server\mongo\data\db --logpath F:\code\server\mongo\data\log\mongo.log --logappend --rest --install (if system error 2 occues) remove the mongo service first, "C:\Program Files\MongoDB\Server\3.4\bin\mongod.exe" --remove