minify css and js inside html + pass w3 validator

src/config.rs

@@ -100,7 +100,12 @@ fn init(dist_dir: String, static_dir: String, templates_dir: String) -> String {
     if cfg!(debug_assertions) {
         ".".to_string()
     } else {
-        let cfg = Cfg::spec_compliant();
+        let cfg = Cfg {
+            keep_closing_tags: true,
+            minify_css: true,
+            minify_js: true,
+            ..Cfg::spec_compliant()
+        };
 
         // Static files
         for entry in glob(&format!("{static_dir}/**/*.*")).unwrap() {