update readme

README.md

@@ -1,2 +1,28 @@
 # ZMOTD - zig motd
 Literally just a motd setter for my servers.
+
+All this program does it gather system information and prints it as pretty as
+possible. It's configured in toml and the default layout is as follows:
+```toml
+entries = [
+  { m = "hostname", f = "fig" }, # m for module name, f for format name
+  { m = "distro" },
+  { m = "kernel" },
+  { m = "load" },
+  { m = "uptime" },
+]
+```
+which looks like this:
+```
+ __ ___ _ ___  ___  ___ _ __
+ \ V / '_/ _ \/ _ \/ _ \ '  \
+  \_/|_| \___/\___/\___/_|_|_|
+
+Distro: Void
+Kernel: 6.16.6_1
+Load: 0.13, 0.29, 0.49
+Uptime: 1 week, 6 days, 23 hours, 26 minutes
+```
+
+To actually set your motd just write the output to `/etc/motd` or wherever your
+system stores it.