feat: embed static files into binary

handlers/handler_test.go

@@ -0,0 +1,13 @@
+package handlers
+
+import (
+	"io/fs"
+	"os"
+	"path"
+)
+
+type assets struct{}
+
+func (assets) Open(p string) (fs.File, error) {
+	return os.Open(path.Join("./", p))
+}