init pelican nix environment

shell.nix

@@ -0,0 +1,10 @@
+{ pkgs ? import <nixpkgs> {} }:
+
+pkgs.mkShell {
+  buildInputs = [
+    (pkgs.python3.withPackages (ps: with ps; [
+      pelican
+      markdown
+    ]))
+  ];
+}