Fixed the deployment to heroku

[ps-19]

This pull request makes the following changes:
After brain storming for many hours on heroku and repo i got the silly reason for the issue.

Testing checklist:

• I have tested the build.

• I certify that I ran my checklist

Fixes ushahidi/platform#4288.

Ping @ushahidi/platform

[Angamanga]

@tuxpiper Could you review this? 🙏

[tuxpiper]

I think that's fine, but since it's the develop branch, a disclaimer should be added that the deployed site may not work or be usable (unstable version).

Otherwise, it should point to the "main" branch instead.

Could you please adjust @ps-19 ?

[tuxpiper]

Changes requested

[ps-19]

@tuxpiper sir where should i add the disclaimer, in the readme.md file.

And even if it is pointing towards main still "No app.json located in the repo URL provided" is showing it should point to developer branch to successfully deploy on heroku i have tested both.

[tuxpiper]

Oh I see, so it looks like we are actually missing more bits here in order to make this PR viable..

@Angamanga do you recall if we had that app.json before and was removed as part of the Single-SPA changes?

[tuxpiper]

I think that without that missing app.json file, we should close this PR. Anyone willing to spend a few minutes, I'm pretty sure they can fish that out from previous commits.