docs: update README.md

README.md

@@ -5,6 +5,31 @@ zigeru is a IRC bot which implements the following commands:
 - `s/OLD/NEW/` -- posts the previous message by the user, where every
   occurrence of OLD is replaced by NEW.
 
+```
+00:04 <jassob> hello, world
+00:05 <jassob> s/world/IRC/
+00:05 <@eru> jassob: "hello, IRC"
+```
+
+- `!help` -- post a usage string as a response.
+
+```
+00:05 <jassob> !help
+00:05 <@eru> Send `s/TYPO/CORRECTION/` to replace TYPO with CORRECTION in your last message.
+```
+
+- `!join #CHANNEL` -- make zigeru join #CHANNEL.
+
+```
+# in #eru-test2
+00:06 <jassob> !join #eru-test3
+
+# in #eru-test3
+00:06 --> jassob (~u@6wh6sdzhnfjx4.dtek.se) has joined #eru-test3
+00:06 -- Channel #eru-test3: 2 nicks (0 owners, 0 admins, 1 op, 0 halfops, 0 voiced, 1 regular)
+00:06 -- Channel created on ons, 11 mar 2026 00:06:44
+```
+
 ## Getting started
 
 To enter into a development shell with all the tools needed for
@@ -20,7 +45,4 @@ To run the binary: `zig build run`.
 
 To build the binary: `zig build`.
 
-## TO DO
-
-- [ ] Add IRC support
-- [ ] Add TLS support
+To build the binary statically: `zig build -Dtarget=x86_64-linux-musl`