$ cd app
$ mkdir common
$ cd common/
$ npm init -y

$ git init
$ git add .
$ git commit -m "initial commit"

$ npm login
$ npm publish --acces public

$ tsc --init
$ npm install --save-dev typescript del-cli

"declaration": true
"outDir": "./build"

$ npm run build

$ npm version patch
$ npm run build

auth/src/errors copy to common/src/errors
auth/src/middlewares copy to common/src/middlewares

$ npm install --save \
express \
express-validator \
cookie-session \
jsonwebtoken \
@types/cookie-session \
@types/express \
@types/jsonwebtoken

$ tsc

$ npm run publish

$ cd auth
$ npm install --save @adi-microservices/common

$ cd auth
$ npm update @adi-microservices/common