Add explanation for adding everything as dependencies to docs (#6082)
Add explanation for adding everything as dependencies to docs (#6082)

* Update available-scripts.md

add the reason for adding packages as dependencies

* Update available-scripts.md

* Update available-scripts.md

* Update available-scripts.md


Co-authored-by: Amy Lam <5c18f3e0f7e9a758fa794c61b0598ea30c7336dd@gmail.com>
Co-authored-by: Ian Sutherland <57a33a5496950fec8433e4dd83347673459dcdfc@iansutherland.ca>
jdcrensh/create-react-app,GreenGremlin/create-react-app,Timer/create-react-app,d3ce1t/create-react-app,d3ce1t/create-react-app,facebookincubator/create-react-app,jdcrensh/create-react-app,ConnectedHomes/create-react-web-app,Timer/create-react-app,GreenGremlin/create-react-app,ConnectedHomes/create-react-web-app,jdcrensh/create-react-app,jdcrensh/create-react-app,Timer/create-react-app,GreenGremlin/create-react-app,GreenGremlin/create-react-app,d3ce1t/create-react-app,ConnectedHomes/create-react-web-app,facebookincubator/create-react-app,facebookincubator/create-react-app,ConnectedHomes/create-react-web-app,Timer/create-react-app,d3ce1t/create-react-app