x/playground: CORS in fmt/edit routes

[mo4islona]

Playground snippets are not working properly on third-party sites.
fmt/edit routes are blocking by CORS.

I am working on new concept of snippets that can be easily integrated in any React app or even standalone. Take a look on https://mo4islona.github.io/material-go-playground/ it has a lot of examples. But some function are not working because of CORS policy.

I have a PR that fixes routes: https://go-review.googlesource.com/c/playground/+/193798

[gopherbot]

Change https://golang.org/cl/193798 mentions this issue: playground: add CORS headers to fmt/edit route

[mo4islona]

Fix is here - https://go-review.googlesource.com/c/playground/+/193798
Could it be merged?

[toothrot]

@mo4islona Sorry about the delay on this. I'll work on getting it deployed today, if it hasn't automatically deployed already.

[toothrot]

@mo4islona This is finally deployed. There were several issues blocking deployments to the playground that have since been resolved.