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Setting up a new Pipeline in Heroku. I connected the app to GitHub. Starting with simple React application (via npx create-react-app) in order to see the Pipeline in action, but getting missing -a flag error. I understand that it says it is missing the target application but I don't know why. I've repeated the Pipeline settp several times to the same effect. Have read through the documentation a couple of times and not quite sure why the app is failing.

$ heroku logs --tail
 ›   Error: Missing required flag:
 ›     -a, --app APP  app to run command against
 ›   See more help with --help

First, I realized the error was because of it being a React app only, a front-end without a server. So, I spun up an Express server (via https://github.com/mateo-navarrete/create-react-express-app). However, I am getting the same error.

Can anyone offer clarifications on getting a MERN app into Heroku Pipelines? Thanks!

Perry Cipolloni
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  • I might be answering my own question here, but it occurred to me that this is a Front End app only, a component. I would need to set it up as a MERN application or something. – Perry Cipolloni Apr 18 '20 at 17:43
  • Actually, spun up create-react-express-app https://github.com/mateo-navarrete/create-react-express-app and got the same error. Still not clear on while I am getting the missing -a flag / application error. – Perry Cipolloni Apr 21 '20 at 13:19

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