Add code example to README

README.md

@@ -2,7 +2,7 @@
 
 [Salix](https://gitea.elara.ws/Elara6331/salix) tag for markdown rendering.
 
-Example:
+Template Example:
 
 ```markdown
 <div>
@@ -12,3 +12,23 @@ Example:
     #!markdown
 </div>
 ```
+
+Code Example:
+
+```go
+md := goldmark.New(goldmark.WithExtensions(extension.GFM))
+
+tmpl, err := salix.New().ParseFile("example.txt")
+if err != nil {
+	panic(err)
+}
+
+err = tmpl.
+	WithTagMap(map[string]salix.Tag{
+		"markdown": salixmd.New(md),
+	}).
+	Execute(os.Stdout)
+if err != nil {
+	panic(err)
+}
+```