`curl --insecure` doesn't work with cvm-proxy server

[metachris]

When trying to use curl --insecure <cvm_proxy_url>, it's returning errors.

On the curl client side:

curl: (35) error:0A000438:SSL routines::tlsv1 alert internal error

On the cvm-proxy server side:

http: TLS handshake error from 95.94.96.182:34856: illegal base64 data at input byte 10

Not critical as the main verification scripts still work, see also https://buildernet.org/docs/send-orderflow#tee-attestation

But might be worth investigating, and if i recall correctly it did work in the past 🤔

[Ruteri]

Ideally we have a test as well to prevent regressions