learned from udemy sudo: required #above says we need to have superuser-level permission to make this working services: - docker #above says we need the docker cli installed so it will install a copy of docker into the running container before_install : - docker build -t kishlayraj2/docker-react -f Dockerfile.dev . #above says what needs to happen before we deploy our project or run our test script : # will tell how to run the test suite # if from any of the below commands it gets any return code other than 0 then its going to assume that the process has failed - docker run kishlayraj2/docker-react npm run test -- --coverage #the only problem here is that "npm run test" wait for input from the user and doesn't terminate itself automatically, and to make it stop automatically we will use -- --coverage