Add tutorial for OpenBSD

Deployment.md

@@ -89,9 +89,87 @@ $ sudo systemctl enable ssh-chat                                    # ensures ss
 $ sudo systemctl start ssh-chat                                     # starts the ssh-chat daemon
 ```
 
-#
+# Running on OpenBSD
 
-Additional resources:
+Building ssh-chat on OpenBSD is the same as in other systems. All we need is to install Go.
+
+```
+# pkg_add go
+```
+
+## Running as a service
+
+It's perfectly valid to not run ssh-chat as a service. Simply running `$ ssh-chat` yourself or running it inside Tmux works great. For example, you can add the following to run ssh-chat whenever your computer boots by putting the following in your crontab:
+
+```
+@reboot tmux new-session -d '/path/to/ssh-chat [...]'
+```
+
+But if you want to run it as a service, you can try the following:
+
+### Put the executable in a standard location
+
+You can create a link to the existing binary or move it completely to `/usr/local/bin`.
+
+```
+# ln -s ~/ssh-chat/ssh-chat /usr/local/bin/ssh-chat
+```
+
+### Create the user that will run this service
+
+You can use `useradd` or `adduser`. For example:
+
+```
+# useradd -m chat
+```
+
+### Create the directory where ssh-chat configuration will live
+
+Let's make sure to set the right permissions as well.
+
+```
+# mkdir /var/ssh-chat
+# chown chat:chat /var/chat
+```
+
+### Create the service
+
+Finally, let's create the service. Create a file called `/etc/rc.d/ssh_chat` with the following contents:
+
+```
+#!/bin/ksh
+
+daemon="/usr/local/bin/ssh-chat"
+daemon_logger="daemon.info"
+daemon_flags="--verbose --bind ':PORT' --identity PRIVATE_KEY --admin=ADMIN_FILE --motd=MOTD_FILE"
+daemon_user="USER"
+
+. /etc/rc.d/rc.subr
+
+rc_bg=YES
+rc_reload=NO
+
+rc_cmd $1
+```
+
+Modify the values in `daemon_flags` and `daemon_user` based on your configurations. Alternately, you can set the flags directly with `rcctl`:
+
+```
+# rcctl set ssh_chat flags --verbose --bind [...] --identity [...]
+```
+
+After that, you can enable and run the service:
+
+```
+# rcctl enable ssh_chat
+# rcctl start ssh_chat
+```
+
+### Logs
+
+The logs will be found in `/var/log/daemon` so monitor that file if you run into any issues.
+
+# Additional resources:
 
 - https://impactcore.blogspot.ca/2017/09/ssh-chat-irc-like-chat-client-over-ssh.html
 - https://ozgurkazancci.com/setup-ssh-chat-an-sshd-based-chat-server-on-openbsd/ #ssh-chat running under OpenBSD