Update README.md to include user option

[thampton]

Update README.md documentation to address #618

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[MikeMcC399]

@thampton

• We should probably troubleshoot The Cypress App could not be unzipped when using github action #618 first to see where this is coming from. See The Cypress App could not be unzipped when using github action #618 (comment).

The example in the README > Docker image works correctly with or without specifying options: --user 1001. Normally the user 1001 is only necessary for Firefox, however I understand that you have had a different experience.

There are already open PRs

• docs: adding in information on running firefox in a container in the README #938
• Add Firefox user id 1001 to README common problems cypress-docker-images#871

to deal with the Firefox issue. These are waiting for feedback from the Cypress team at the moment.

If we are missing some other case then it would be good to understand this before making documentation changes. Please also make yourself familiar with the CONTRIBUTING.md document as you haven't used semantic commit conventions. It's also better not to make changes in a fork's master branch as it makes reviewing more difficult. You don't need to change the branch this time, but any new PR you submit should use a different name.

[MikeMcC399]

@thampton

• Unfortunately your issue The Cypress App could not be unzipped when using github action #618 has been closed due to inactivity, so that also brings this PR into question.

[MikeMcC399]

@thampton

I have picked up your suggestion from this PR and incorporated it in a new PR #992.

[MikeMcC399]

• This PR can now be closed, since PR docs: rework docker example #992 has been merged and the README > Docker image section has been updated accordingly.