Update README: replace my-app by folder name

[italopessoa]

Prerequisites

• [x] Did you check if your issue has already been reported?
• [x] Are you running the latest version?
• [x] Did you check the Official Create React App User Guide?

Expected Behavior

Folder Structure

After creation, your project should look like this:

user_folder_name/
  README.md
  node_modules/
  package.json
  public/
    index.html
    favicon.ico
  src/
    App.css
    App.js
    App.test.js
    index.css
    index.js
    logo.svg

Current Behavior

Folder Structure

After creation, your project should look like this:

my-app/
  README.md
  node_modules/
  package.json
  public/
    index.html
    favicon.ico
  src/
    App.css
    App.js
    App.test.js
    index.css
    index.js
    logo.svg

Possible Solution

replace all occurrences of my-app by user folder name

[Polyneue]

Mind if I knock this out?

[italopessoa]

Go ahead @Polyneue 😄