Front End README is unclear on how to run unit tests

[ecerami]

In the current Front End README file, it says:

To run unit/integration tests (need to have API URL defined in .env)

But, I am not sure what this means:

• What is .env? Do we create one locally?
• What is the API URL used for?
• What value should we set for API URL?

Am happy to update the docs to explain, but I don't know the answers to the above.

Tagging @alisman @Luke-Sikina for help.

[Luke-Sikina]

To run unit/integration tests (need to have API URL defined in .env)

@inodb you added the quoted line about 3 years ago. I don't have a .env and tests pass for me. Does .env still serve a purpose?

[inodb]

.env is legacy. Can be removed

[ecerami]

Ok, I can update the README to remove .env. But, I still can't get the unit tests to run to the end. See #7096. Once I figure that out, I can circle back here and update the README docs.