added autoUpgrade and automatic GC for the system

nixos/configuration.nix

@@ -130,10 +130,36 @@
   nix.settings = {
     experimental-features = [ "nix-command" "flakes" ];    
     auto-optimise-store = true;
-    substituters = ["https://hyprland.cachix.org"];
-    trusted-public-keys = ["hyprland.cachix.org-1:a7pgxzMz7+chwVL3/pzj6jIBMioiJM7ypFP8PwtkuGc="];
   };
   
+  # Optimize storage and automatic scheduled GC running
+  # If you want to run GC manually, use commands:
+  # `nix-store --optimize` for finding and eliminating redundant copies of identical store paths
+  # `nix-store --gc` for optimizing the nix store and removing unreferenced and obsolete store paths
+  # `nix-collect-garbage -d` for deleting old generations of user profiles
+  nix.optimise.automatic = true;
+  nix.gc = {
+    automatic = true;
+    dates = "weekly";
+    options = "--delete-older-than 15d";
+  };
+
+  # Change runtime directory size
+  services.logind.extraConfig = "RuntimeDirectorySize=4G";
+
+  # Scheduled auto upgrade system (this is only for system upgrades, 
+  # if you want to upgrade cargo\npm\pip global packages, docker containers or different part of the system 
+  # or get really full system upgrade, use `topgrade` CLI utility manually instead.
+  # I recommend to use `topgrade` once a week or at least once a month)
+  system.autoUpgrade = {
+    enable = true;
+    operation = "switch"; # If you don't want to apply updates immediately, only after rebooting, use `boot` option in this case
+    flake = "/etc/nixos";
+    flags = [ "--update-input" "nixpkgs" "--commit-lock-file" ];
+    dates = "daily";
+    # channel = "https://nixos.org/channels/nixos-unstable";
+  };
+
   # Linux Kernel
   boot.kernelPackages = pkgs.linuxKernel.packages.linux_zen;
 
@@ -459,17 +485,19 @@
     cargo-spellcheck
     cargo-modules
     cargo-bloat
-    # cargo
     bacon
     taplo #toml formatter & lsp
 
     lldb
+    llvmPackages.bintools
     gcc13
+
     wasmedge
     lunatic
+    # wasm3
+
     license-generator
     git-ignore
-
     xh
     wezterm
     cool-retro-term