Update readme.

1 job for express-logger in 12 seconds (queued for 2 seconds)
Status Job ID Name Coverage
failed #44763


Name Stage Failure
test Test
npm ERR! not found: git
npm ERR!
npm ERR! Failed using git.
npm ERR! This is most likely not a problem with npm itself.
npm ERR! Please check if you have git installed and in your PATH.

npm ERR! Please include the following file with any support request:
npm ERR! /root/.npm/_logs/2019-02-25T14_35_10_857Z-debug.log
ERROR: Job failed: exit code 1