3000 port conflicts with create-divi-extension

[daniesy]

The 3000 port conflicts with create-divi-extension after running yarn start.

[etstaging]

QA Checklist

Reporter

• Helpful title used  
  • Helpful title format: Scope(s) :: One Sentence To Describe The Issue
  • Example: VB :: Floating Toolbar :: Jumps To Top Of Page
• Detailed description
  • Description should usually be 150+ characters.
• Steps to reproduce included
• Support Ticket URL included
• Image and/or gif

Developer

• Steps to reproduce proven solved
• Test included and coverage acceptable and all Tests passing?
• PR description has layman's description of problem and solution and "Areas Affected" listed/explained?
• PR branch includes latest commits from master branch (at the time of checking)?
• Estimated points on issue
• Proper code documentation and conventions?
• Proper RTL appearance
• i18n used if applicable
• Ajax/Form used? Nonce used? Perms checked? All user input sanitized and validated? Intentional unsanitized/unescaped functions used?
• Database saved/updated? Data sanitized and validated?
• Variable output properly escaped and validated?

Peer Review

• PR branch includes latest commits from master branch (at the time of checking)?
• Steps to reproduce proven solved
• Affected areas are tested and ok
• Proper code documentation and conventions
• Proper RTL appearance
• i18n used if applicable
• Test(s) included and coverage acceptable
• Ajax/Form used? Nonce used? Perms checked? All user input sanitized and validated? Intentional unsanitized/unescaped functions used?
• Database saved/updated? Data sanitized and validated?
• Variable output properly escaped and validated?

Quality Assurance

• All tests passed on CircleCI.
• Steps to reproduce passed, the fix works.
• No errors in console or output
• Affected areas are tested and ok
• The fix does not change a customer's website in any surprising or unintended way
  • If Divi's design is adjusted, settings are migrated gracefully and invisibly

Design Review

• UI is to spec
• UX is to spec
• Design is to spec
• No surprising visual changes to a customer's website will be experienced after updating
  • Any/all visual changes are migrated gracefully

Dev Review

• Test(s) included and coverage acceptable
• Ajax/Form used? Nonce used? Perms checked? All user input sanitized and validated? Intentional unsanitized/unescaped functions used?
• Database saved/updated? Data sanitized and validated?
• Variable output properly escaped and validated?
• i18n used if applicable
• Implementation acceptable, DRY, Scaleable, future safe
• Best practices used, cleverness and grokage, ES6 use, etc.