FLS-795: Basic auth added

[hamzabinkhalid]

Add ticket reference to Pull Request title: e.g. 'FS-123: Add content', if there is no ticket prefix with BAU

Change description

A brief description of the pull request

• Unit tests and other appropriate tests added or updated
• README and other documentation has been updated / added (if needed)
• Commit messages are meaningful and follow good commit message guidelines (e.g. "FS-XXXX: Add margin to nav items preventing overlapping of logo")

How to test

If manual testing is needed, give suggested testing steps

Screenshots of UI changes (if applicable)

[samuelhwilliams]

Are we only adding to the dev env, not to all non-prod envs?

[hamzabinkhalid]

Are we only adding to the dev env, not to all non-prod envs?

Yes, Currently trying to test all services work on dev with basic auth, if nothing breaks will proceed with changes on test and uat