Follow the commands on their site or like my post. You can use the proxy…
tl:dr
# NOTE: These instructions only work for 64 bit Debian-based
# Linux distributions such as Ubuntu, Mint etc.
# 1. Install our official public software signing key
wget -O- https://updates.signal.org/desktop/apt/keys.asc | gpg --dearmor > signal-desktop-keyring.gpg
cat signal-desktop-keyring.gpg | sudo tee -a /usr/share/keyrings/signal-desktop-keyring.gpg > /dev/null
# 2. Add our repository to your list of repositories
echo 'deb [arch=amd64 signed-by=/usr/share/keyrings/signal-desktop-keyring.gpg] https://updates.signal.org/desktop/apt xenial main' |\
sudo tee -a /etc/apt/sources.list.d/signal-xenial.list
# 3. Update your package database and install signal
sudo apt update && sudo apt install signal-desktop
And i just used:
curl --proxy 127.0.0.1:8082 https://updates.signal.org/desktop/apt/keys.asc | gpg --dearmor > signal-desktop-keyring.gpg
Instead of:
wget -O-
Hope that helps.