Support for CloudFront or other CDN

[Apreche]

Is your feature request related to a problem? Please describe.
listmonk already has support for uploading media into an S3 bucket. That's terrific. However, it is not always desirable to deliver content directly from the bucket itself. It is extremely common to put a CDN, usually AWS CloudFront, in front of the S3 bucket to handle the actual content delivery. Uploads still go to the S3 bucket, but the URLs in the emails would point at the CloudFront URL.

Describe the solution you'd like
Allow configuration of a CloudFront/CDN URL from which media uploaded to S3 will be delivered. When rendering emails, construct URLs pointing at the CDN host instead of at the S3 bucket directly.

[knadh]

Hadn't thought about this. Will consider adding an optional CDN URL.

[ciceroverneck]

I was needing this

Now I need to use the custom url in the admin (/admin/campaigns/media)

[knadh]

This feature is already merged and will be available in the upcoming release this week.

[ciceroverneck]

Yep, but in /admin/campaings/media still using the s3 link

[knadh]

Sorry, I am a bit confused. Are you running master or v2.0.0? Once a custom public URL is configured, it will be used everywhere, in the admin and in e-mails.

[ciceroverneck]

I'm using docker image: listmonk/listmonk:rc5

[ciceroverneck]

I just updated to v2.1.0, and from /admin/campaigns/media the images keep loading from the aws link.

/reopen

[knadh]

Please share a screenshot of your S3 settings UI.

[ciceroverneck]

I'm using Google Cloud Storage interop with S3 API. Images are being saved correctly in the bucket.

[knadh]

The public URL seems to be incorrect. It should be something like https://cc-newslatter.storage.googleapis.com, right?

[ciceroverneck]

No, I use my own CDN that uses the same domain for multiple buckets.