fix: encoding issue in CDN responses

[bparmentier]

What/Why/How?

When downloading the redoc JS from redoc.ly CDN (e.g. https://cdn.redoc.ly/redoc/latest/bundles/redoc.standalone.js) the Content-Type header in the response is missing 'charset=utf-8', causing the file to be displayed with garbled characters.

I faced the issue in my project and found that it was indirectly reported multiple times over the years, as can be seen in #29.

The solution proposed in #213 (comment) is just a workaround and I'm actually not sure why it works for other people because according to https://developer.mozilla.org/en-US/docs/Web/HTML/Element/meta#attr-charset, "UTF-8 is the only valid encoding for HTML5 documents" anyway.

Reference

• aws-cli doesn't automatically detect the charset when uploading files Unable to set charset when mime-types are guessed (S3) aws/aws-cli#1346
• there was also a similar issue opened at Serve CDN files with charset=UTF-8 jsdelivr/bootstrapcdn#949

Testing

Open the above URL in a browser and search for e.g. .ellipsis:after. The value of content should be displayed as

instead of

[AlexVarchuk]

Hi @bparmentier. Thank you a lot for your contribution 🙌