Add build-configs.yaml

Signed-off-by: Oliver Davies <oliver@oliverdavies.uk>

building-static-websites-sculpin/demo/flake.nix

@@ -1,22 +1,26 @@
 {
   inputs.nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
 
-  outputs =
-    { nixpkgs, ... }:
+  outputs = inputs:
     let
       system = "x86_64-linux";
-      pkgs = import nixpkgs { inherit system; };
+      pkgs = import inputs.nixpkgs { inherit system; };
     in
     {
       devShells.${system}.default =
         with pkgs;
         mkShell {
           buildInputs = [
-            php83
+            nodePackages.browser-sync
+
+            (php83.buildEnv {
+              extraConfig = ''
+                error_reporting = E_ALL & ~E_DEPRECATED & ~E_USER_DEPRECATED
+              '';
+            })
+
             php83Packages.composer
           ];
         };
-
-      formatters.${system} = pkgs.nixfmt-rfc-style;
     };
 }