onion-mirror

Install Tor

sudo apt update
sudo apt install tor

Configure Tor

# Disable SOCKS proxy since we aren't making outbound connections
# through Tor
SocksPort 0

# Make sure Tor runs as a daemon (i.e. in the background)
RunAsDaemon 1

# Setup the hidden service on port 80, this is where we tell Tor to
# create a .onion service for our web server
HiddenServiceDir /var/lib/tor/hidden_service/
HiddenServicePort 80

# Disable inbound connections, since we aren't running a relay or
# exit node
ORPort 0

# Disable directory services, since we won't be mirroring directory
# information to other Tor nodes
DirPort 0

sudo systemctl restart tor

Get Your .onion Address

sudo cat /var/lib/tor/hidden_service/hostname

Configure Caddy

http://jytkco7clxwj4hhzaydhk4kr3hwzsdzyvtsc6zn2ivog5uma5pxowzad.onion:80 {
  # Set up a reverse proxy, or serve static files, etc.
}

header {
  Onion-Location http://jytkco7clxwj4hhzaydhk4kr3hwzsdzyvtsc6zn2ivog5uma5pxowzad.onion{uri}
}