hetzner_benchmark: include more personal configurations

nix/configurations/hetzner_benchmark/home/dev.nix

@@ -0,0 +1,29 @@
+{ pkgs, ... }:
+{
+  home.packages = [
+    pkgs.nil # nix
+    pkgs.pyright # python
+  ];
+
+  programs.git = {
+    enable = true;
+    signing.signByDefault = false; # no need to setup the key
+  };
+
+  programs.gpg.enable = true;
+
+  nix = {
+    settings = {
+      extra-substituters = [
+        "https://ghc-nix.cachix.org"
+        "https://haskell-language-server.cachix.org"
+        "https://cache.iog.io"
+      ];
+      extra-trusted-public-keys = [
+        "ghc-nix.cachix.org-1:ziC/I4BPqeA4VbtOFpFpu6D1t6ymFvRWke/lc2+qjcg="
+        "haskell-language-server.cachix.org-1:juFfHrwkOxqIOZShtC4YC1uT1bBcq2RSvC7OMKx0Nz8="
+        "hydra.iohk.io:f/Ea+s+dFdN+3Y/G+FDgSq+a5NEWhJGzdjvKNGv0/EQ="
+      ];
+    };
+  };
+}