Preflight Checklist

• I have read the [Contributing Guidelines](https://github.com/electro

📗 API Reference Docs Problem

meteor build ../youcordovabuild --directory
"Supply the server hostname and port in the --server option for mobile app builds."

https://github.com/meteor/meteor/blob/devel/packages/boilerplate-generator/template-web.cordova.js#L39

optional ROOT_URL with cordova build

load default ROOT_URL with localStorage, fallback to built one if not

Describe the bug
Using xframe ALLOW-FROM throws error in console: Invalid 'X-Frame-Options' header encountered when loading 'https://api.dev.mysite.com/uploads/my-file.pdf': 'ALLOW-FROM dev.mysite.com' is not a recognized directive. The header will be ignored.

https://strapi.io/documentation/v3.x/concepts/middlewares.html#response-middlewares
instructions for xframe indicate `ALLOW-FR

While I try to change header titles by passing array of titles to options like below it does not override the headers. Instead it writes new headers first and original data with old headers again from next cell.

I am experiencing the same problem.

In addition, sheets js is mutating the header array passed in, which is not something I would ever expect.

Example:

const head