Add initial draft of flake.nix

Signed-off-by: Danila Fedorin <danila.fedorin@gmail.com>

flake.nix

@@ -2,16 +2,21 @@
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs/nixos-25.11";
     flake-utils.url = "github:numtide/flake-utils";
+    blog.url = "git+https://dev.danilafe.com/Nix-Configs/blog-static-flake.git";
+    blog.inputs.nixpkgs.follows = "nixpkgs";
   };
 
-  outputs = { self, nixpkgs, flake-utils, }:
+  outputs = { self, nixpkgs, flake-utils, blog, }:
     flake-utils.lib.eachDefaultSystem (system:
       let pkgs = import nixpkgs { inherit system; };
+          builtBlog = blog.defaultPackage.${system};
       in {
-        default = pkgs.mkShell {
+        devShell = pkgs.mkShell {
           packages = [
             pkgs.nodejs
             pkgs.yarn
+            pkgs.chromium
+            builtBlog
           ];
 
           nativeBuildInputs = [ pkgs.yarnConfigHook ];
@@ -19,10 +24,15 @@
           # Must be named this for pkgs.yarnConfigHook
           yarnOfflineCache = pkgs.fetchYarnDeps {
             yarnLock = ./yarn.lock;
+            hash = "sha256-jUa1XkxJ2dS6nTyH/gRrTkEedSUgcl7k6wd3OiCkj6A=";
           };
 
-          # PLAYWRIGHT_BROWSERS_PATH = pkgs.playwright-driver.browsers;
-          # PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD = "1";
+          # Configure to use system Chromium
+          PLAYWRIGHT_CHROMIUM_PATH = "${pkgs.chromium}/bin/chromium";
+          PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD = "1";
+
+          # Expose the built blog package, which we'll be testing
+          builtBlog = builtBlog;
 
           # Optional but often needed in Nix sandboxes:
           # XDG_CACHE_HOME = "$TMPDIR/xdg-cache";