I don't support or encourage self-harm, it's purely a fictional game mechanic.
If you write /Suicide in the Chat, you die and instead of /Suicide it says I committed Suicide.
You put the Suicide.lua file in the AutoRun folder. You must create a new folder called Configs that is in the same folder as the Server start file and put the Config.txt in there.
# Enable or disable the plugin
enabled=true
# Enable debug messages in the console
debug=false
# Enable for logs in the console if the Command was executed
log=false