grpc.md

• If you run yarn install and encounter these errors:

... blah blah blah
gyp ERR! node -v v12.4.0
gyp ERR! node-gyp -v v5.0.1
gyp ERR! not ok 
...
node-pre-gyp ERR! node -v v12.4.0
node-pre-gyp ERR! node-pre-gyp -v v0.10.3
node-pre-gyp ERR! not ok 

This is a known conflict between node v12.* and grpc. Run this command:

$ yarn upgrade node-gyp@latest node-pre-gyp@latest

Then:

$ yarn install

Or you can downgrade your Node.js to version 10.*