Incorrect MIME type (text/html) used for all(?) Packages.gz

[rhencke]

The current distribution URLs (at least) are broken:

https://deb.nodesource.com/node_14.x/dists/focal/main/binary-amd64/Packages.gz https://deb.nodesource.com/node_15.x/dists/focal/main/binary-amd64/Packages.gz https://deb.nodesource.com/node_16.x/dists/focal/main/binary-amd64/Packages.gz

They are being served up as content-type: text/html instead of the correct content type which you can verify by clicking one.

(Incorrect MIME type is also on GPG signatures it seems as text/html)