How to register a website certificate in Ubuntu?

Question

ubuntu

there is an Ubuntu Server
running two sites on it, one http listens on port 5000, the
other https listens on port 5001
The first site redirects to the second.
if you write in the console,
wget http://localhost:5000
it gives out this thing:

Resolving localhost (localhost)... 127.0.0.1
Connecting to localhost (localhost)|127.0.0.1|:5000... connected.
HTTP request sent, awaiting response... 307 Temporary Redirect
Location: https://localhost:5001/ [following]
--2019-07-07 17:13:45--  https://localhost:5001/
Connecting to localhost (localhost)|127.0.0.1|:5001... connected.
ERROR: cannot verify localhost's certificate, issued by ‘CN=localhost’:
  Unable to locally verify the issuer's authority.
To connect to localhost insecurely, use `--no-check-certificate'.

it is necessary to make it so that it does not issue (do not offer the --no-check-certificate key)
I did the following commands:

sudo apt-get install gnutls-bin 
gnutls-cli --print-cert localhost:5001 </dev/null| sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > myserver.crt
sudo cp myserver.crt /usr/local/share/ca-certificates/myserver.crt
sudo update-ca-certificates

but didn't help

Answer 1

Add a certificate (presumably self-signed) to the trusted certificate store and make a corresponding link to it in this way:
Where is the store of trusted certificates in bubuntu - I don't know. Usually it is in /etc/ssl/certs, but in el6 it is for example in /etc/pki/tls/certs