added duf and nginx and some refactor

sources.txt

@@ -28,3 +28,4 @@ https://dl.gitea.com/gitea/1.22.4/gitea-1.22.4-linux-arm-5
 # https://github.com/LuaDist/libsqlite3.git
 # https://w1.fi/releases/wpa_supplicant-2.11.tar.gz
 # https://download.savannah.gnu.org/releases/tinycc/tcc-0.9.27.tar.bz2
+https://github.com/nginx/nginx/releases/download/release-1.29.5/nginx-1.29.5.tar.gz