Feat Request: Overwrite default currency

[cmergenthaler]

Is your feature request related to a problem? Please describe.
The default currency is USD which is hardcorded in https://github.com/opencost/opencost/blob/develop/ui/src/Reports.js#L128

Describe the solution you'd like
Let us somehow overwrite the default currency by e.g setting an environment variable.
I'd be happy to file a PR if this is an accepted solution

Describe alternatives you've considered
Always needed to change to my local currency from USD is inconvenient.

[mattray]

That sounds like a nice feature to add. A PR against the UI as an environment variable would make sense. Thanks!

[jash2105]

@mattray ...can I work on this?

[mattray]

@jash2105 definitely, we're happy to take PRs. I'll keep an eye out for it