Location based Ngrok Server configuration of DASH

[0xPrateek]

• Ngrok provides servers which are located at 7 different location in the world and for faster file transfer we need to select the nearest server and this can be different to a different user.
• The objective of this issue is to add one more configuration step to DASH which will ask the user to enter the server which is nearest to them ;

code | country
us | United States
eu | Europe
ap  | Asia/Pacific
au  | Australia
sa  | South America
jp  | Japan
in  | India
`

and depending on the selected location we need to update the line number 58 of dash.py

ngrok = subprocess.Popen(['ngrok','http','-region','**Server Code**' ,str(port)], stdout = subprocess.PIP )

• For more information about ngrok region configuration you can check here