I have moved your question into the Web Data Connector space as this area is more specialist for developers of web data connectors who may be able to advise.
Also I noticed on the page you referenced there's a 'Submit an Issue' link at the top of the screen, that maybe you could use to direct your question to the people who own that content.
If you are using a Mac, there is an application called "Terminal" that is the mac application for a command line interface. This is similar to the Command Prompt application on Windows.
I think the documentation is unclear here and I will get it improved. Are you using Mac or Windows?
I am using windows.
On Windows, the easiest thing to do will be to navigate to where your 'webdataconnector' folder is located via the File Explorer. Once you have located the webdataconnector folder in the File Navigator, hold down the Shift key, and right click the 'webdataconnector' folder. Then, choose the option that says "Open command window here".
This will launch a command line tool where you will be able to enter commands and continue with the WDC tutorial.
I have already done this step.
Actually I want to run the '
npm install --production' but I don't know where to run this command. help me for that.
Not sure if you have already figured this out. If not, you need to run it on the Command Prompt ("cmd.exe").