Enable Steam and 32-bit graphics support

configuration.nix

@@ -81,6 +81,9 @@
   hardware.bluetooth.enable = true;
   hardware.bluetooth.powerOnBoot = true;
 
+  # Some Proton games may need 32-bit graphics support
+  hardware.graphics.enable32Bit = true;
+  
   # Configure keymap in X11
   services.xserver.xkb.layout = "us";
   # services.xserver.xkb.options = "eurosign:e,caps:escape";
@@ -125,7 +128,8 @@
     };
   };
 
-  # programs.firefox.enable = true;
+  # Add Valve's Steam for games
+  programs.steam.enable = true;
 
   # List packages installed in system profile.
   # You can use https://search.nixos.org/ to find more packages (and options).