Install via Package Manager in private server behide proxy server

[first087]

I install with script from https://deb.nodesource.com/setup_5.x into linux jessie.

For command curl cann't use proxy, but i can setup proxy for wget and use from command below.

wget -qO- https://deb.nodesource.com/setup_5.x | bash -

But... I get this message.

## Confirming "jessie" is supported...

+ curl -sLf -o /dev/null 'https://deb.nodesource.com/node_5.x/dists/jessie/Release'

## Your distribution, identified as "jessie", is not currently supported, please contact NodeSource at https://github.com/nodesource/distributions/issues if you think this is incorrect or would like your distribution to be considered for support

Then, I download script from https://deb.nodesource.com/setup_5.x and remove all if [ -x /usr/bin/curl ]; condition for force use wget. But I get this message.

Err https://deb.nodesource.com jessie/main Sources
  gnutls_handshake() failed: Error in the pull function.
Err https://deb.nodesource.com jessie/main amd64 Packages
  gnutls_handshake() failed: Error in the pull function.
Ign https://deb.nodesource.com jessie/main Translation-en_US
Ign https://deb.nodesource.com jessie/main Translation-en
Fetched 18.4 MB in 26s (685 kB/s)
W: Failed to fetch https://deb.nodesource.com/node_5.x/dists/jessie/main/source/Sources  gnutls_handshake() failed: Error in the pull function.

W: Failed to fetch https://deb.nodesource.com/node_5.x/dists/jessie/main/binary-amd64/Packages  gnutls_handshake() failed: Error in the pull function.

E: Some index files failed to download. They have been ignored, or old ones used instead.
Error executing command, exiting

Please help.

[retrohacker]

We are adding a proxy question to a FAQ in the project's README. It will land in: #308