.travis.yml

# first say what language we use
language: node_js
# what version - array
node_js:
  - "11.7"
# now define dist use as base image for vm of ci
# trusty is specific version of linux
dist: trusty
# now define services we require for our
# like db or outside modules
services:
  - mongodb
  - redis-server
# env var when run on ci server
env:
  - NODE_ENV=ci PORT=3000
# let travis server know to cache node modules to increase speed for next time
cache:
  directories:
    - node_modules
    - client/node_modules
# couple of commands we want to executed at cl
# to get our project ready
install:
  - npm install
# specific to this project
  - npm run build
# similar to i start server and exec tests
# & run this command on sub shell(background) = let us still use command line cool
#  then server killed with pkill node
# nohup no hang up dont care about shell closed or tied keep process running
# must give server delay to dont run so soon tiny pause for req
script:
  - nohup npm run start &
  - sleep 3
  - npm run test
# must connect mongodb and redis to our CI machine => url and port