Ionic deployment build error with cypress in gitlab ci - ionic-framework

Question

I have a CI/CD process with gitlab ci for ionic app deployment for auto content update using this gitlab-ci.yml
image: cypress/base:10
stages:
- build
before_script:
- rm -rf node_modules
- npm install
- npm install -g tslint typescript
build_app:
stage: build
artifacts:
paths:
- /myApp/myApp-app/cypress/screenshots/
- /myApp/myApp-app/cypress/videos/
expire_in: 1 week
when: always
script:
# run tslint
- tslint --project tsconfig.json --config tslint.json
- npm run e2e
The above step is used for build. But build is getting failed with the below error.
starting server using command "ionic:serve"
and when url "http-get://localhost:8100" is responding
running tests using command "npm run cypress:run"
/bin/sh: 1: ionic:serve: not found
Error: server closed unexpectedly
at ChildProcess.onClose (/builds/myApp-ai/myApp-app/node_modules/start-server-and-test/src/index.js:68:14)
at ChildProcess.emit (events.js:182:13)
at maybeClose (internal/child_process.js:962:16)
at Process.ChildProcess._handle.onexit (internal/child_process.js:251:5)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! mapsit-app#0.0.1 e2e: `start-server-and-test ionic:serve http-get://localhost:8100 cypress:run`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the mapsit-app#0.0.1 e2e script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm ERR! A complete log of this run can be found in:
npm ERR! /root/.npm/_logs/2019-09-08T05_50_39_435Z-debug.log
Uploading artifacts...
WARNING: /myApp/myApp-app/cypress/screenshots/: no matching files
WARNING: /myApp/myApp-app/cypress/videos/: no matching files
ERROR: No files to upload
ERROR: Job failed: exit code 1