Is your feature request related to a problem? Please describe.
As a newbie open source developer, I sometimes struggle with build instructions that require prerequisite knowledge. In the README, the instructions for running CyberChef locally already assume that you

• Have Docker desktop installed
• Have Docker desktop running
• Know how to navigate to the localhost URL to use the application

Describe the solution you'd like
Append more instructions on how to run the project locally, by describing every step with as much context as necessary.

Describe alternatives you've considered
This issue has one simple solution, which would be appending more instructions in the README.

Additional context
To be clear, this is the build instructions that would be revised