Add flake

Signed-off-by: Nick Karaolidis <Nick.Karaolidis@sas.com>

treefmt.nix

@@ -0,0 +1,36 @@
+{ pkgs, ... }:
+{
+  projectRootFile = "flake.nix";
+
+  programs = {
+    nixfmt = {
+      enable = true;
+      strict = true;
+    };
+
+    taplo.enable = true;
+
+    prettier = {
+      enable = true;
+
+      settings = {
+        plugins = [
+          "${pkgs.prettier-plugin-go-template}/lib/node_modules/prettier-plugin-go-template/lib/index.js"
+        ];
+
+        overrides = [
+          {
+            files = [ "*.html" ];
+            options.parser = "go-template";
+          }
+        ];
+      };
+    };
+  };
+
+  settings.global.excludes = [
+    ".envrc"
+    "public/**"
+    "static/**"
+  ];
+}