Allow passing a flag to disable origin checking on the local dev server

[torch2424]

SSH Reverse proxying (think ngrok) is often used to expose a ports on a local machine, through a port on a VPS.

However, the dev server does some origin checking, and we have an allowed list to only allow certain origins for development. See the following:

https://github.com/torch2424/amphtml/blob/ecefc5f81ff9c1dd1555171a7d5000bdca6bcd1e/build-system/app.js#L193
https://github.com/torch2424/amphtml/blob/ecefc5f81ff9c1dd1555171a7d5000bdca6bcd1e/build-system/app.js#L1370

And here is a place where I make an API Call I want to go through:

https://github.com/ampproject/amphtml/blob/master/extensions/amp-consent/0.1/cmps.js#L33

We should offer a flag like --disable-origin-check in the gulp serve command, to allow the API to allow requests from any origin 😄

cc @erwinmombay

[rsimha]

@alanorozco @erwinmombay Is this still relevant?

[erwinmombay]

im not 100% sure, i can see the benefit of it i just don't know if we've circumvented/fixed the issue with all the server changes along the way

[rsimha]

[Infra triage] Is this something we'd like to do? If not, can this be closed?

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 7 days if no further activity occurs. Thank you for your contributions.