Add generation instructions to README

README.md

@@ -2,7 +2,7 @@
 
 [![Go Reference](https://pkg.go.dev/badge/go.arsenm.dev/go-lemmy.svg)](https://pkg.go.dev/go.arsenm.dev/go-lemmy)
 
-Go bindings to the [Lemmy](https://join-lemmy.org) API
+Go bindings to the [Lemmy](https://join-lemmy.org) API, automatically generated directly from Lemmy's source code using the generator in [cmd/gen](cmd/gen).
 
 Example:
 
@@ -29,3 +29,31 @@ if err != nil {
 	panic(err)
 }
 ```
+
+### How to generate
+
+First, build the generator:
+
+```bash
+go build ./cmd/gen
+```
+
+Clone Lemmy's source code at whatever version you need:
+
+```bash
+git clone https://github.com/LemmyNet/lemmy -b 0.16.7
+```
+
+Remove all the existing generated code:
+
+```bash
+rm **/*.gen.go
+```
+
+Execute the generator:
+
+```bash
+./gen -out-dir .
+```
+
+And that's it! Your generated code should be ready for use.