Update Readme

[sunnymui]

Some of the info in the readme is outdated, so should update it.

• Project info file not needed anymore I believe
• Should note that you must be in the project directory to run commands
• npm run win-all seems to be not working
• Add troubleshooting: if you get a missing module error message, you can try npm rebuild or running npm i again which will reinstall all the project dependencies