oEmbed API should use CORS (#6562)

* oEmbed API should use CORS

* Simplify cors function call

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Co-authored-by: Chocobozzz <me@florianbigard.com>

server/core/controllers/services.ts

@@ -1,4 +1,5 @@
 import express from 'express'
+import cors from 'cors'
 import { escapeHTML, forceNumber } from '@peertube/peertube-core-utils'
 import { MChannelSummary } from '@server/types/models/index.js'
 import { EMBED_SIZE, PREVIEWS_SIZE, THUMBNAILS_SIZE, WEBSERVER } from '../initializers/constants.js'
@@ -8,6 +9,7 @@ import { accountNameWithHostGetValidator } from '../middlewares/validators/index
 const servicesRouter = express.Router()
 
 servicesRouter.use('/oembed',
+  cors(),
   apiRateLimiter,
   asyncMiddleware(oembedValidator),
   generateOEmbed