DOC: Terms update in documentation (#956)

* terms-update-in-documentation

* included images

* edited in summary.md

* added images in git-repository.md

* changed image for gcr

* changed image for gcr-1

* changed image for gcr-2

* changed image for gcr-3

* changed image for gcr-4

* changed images ex. env. override

* changed images ex. env. override-1

* changed images ex. env. override-2

* changed images ex. env. override-3

* changed images for all files in creating application

* changed images for all files in creating application-1

* renamed file names

* images update in global configuration

* changes .png to .jpg

* image updates

* changed images

* changed files name in summary.md

* change in README.md

Author: Shubham9t9