Split off server into own module

src/server/auth.v

@@ -0,0 +1,11 @@
+module server
+
+import net.http
+
+fn (mut app App) is_authorized() bool {
+	x_header := app.req.header.get_custom('X-Api-Key', http.HeaderQueryConfig{ exact: true }) or {
+		return false
+	}
+
+	return x_header.trim_space() == app.conf.api_key
+}