Add various performance improvements

flake.nix

@@ -0,0 +1,51 @@
+{
+  description = "rfd-fyi development environment";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = nixpkgs.legacyPackages.${system};
+      in
+      {
+        devShells.default = pkgs.mkShell {
+          buildInputs = with pkgs; [
+            # Node.js LTS with npm
+            nodejs_20
+
+            # Go for backend
+            go
+
+            # Build tools
+            pkg-config
+
+            # Development utilities
+            git
+            curl
+            jq
+
+            # Optional: for better development experience
+            gnumake
+          ];
+
+          shellHook = ''
+            echo "🚀 rfd-fyi development environment loaded"
+            echo "Available commands:"
+            echo "  Frontend: npm install, npm run build, npm run serve"
+            echo "  Backend:  cd backend && CGO_ENABLED=0 go run ."
+            echo ""
+            echo "Node version: $(node --version)"
+            echo "npm version: $(npm --version)"
+            echo "Go version: $(go version)"
+            echo ""
+            echo "Tip: Run 'npm install' to install frontend dependencies"
+            echo "Tip: Vite is available via 'npx vite' or 'npm run build'"
+          '';
+        };
+      }
+    );
+}