[koa2] Service npm run dev background startup error reported Unable to start '.' is not recognized as an internal or external command, operable program or batch file.

Steps to use koa2 to build services:

npm i koa-generator -g

koa2 server_name

cd server_name

npm i koa2-cors -S // solve cross domain

npm install

When we enable the koa2 framework to build services, use the command npm run dev, and the following error will be reported at this time:

Reason: npm version mismatch, npm requires version 6.X

Modification method

Then  npm run dev  service starts successfully

The above are the problems I encountered during the use process. If other friends have any questions, please leave a message in the comment area, thank you~~