fix: update .gitignore to exclude unnecessary directories

Modified .gitignore to ensure that specific directories are excluded from version control, preventing unnecessary tracking of generated data and maintaining a cleaner repository.

nixpacks.toml

@@ -0,0 +1,9 @@
+[phases.setup]
+nixPkgs = [
+  "python3",
+  "pkg-config",
+  "gnumake",
+  "gcc"
+]
+
+