add scripts for vscode server

scripts/nix-vscode-server

@@ -0,0 +1,18 @@
+#! /usr/bin/env nix-shell
+#! nix-shell --pure -i runghc -p "haskellPackages.ghcWithPackages (pkgs: [ pkgs.turtle ])"
+
+{-# LANGUAGE OverloadedStrings #-}
+import Turtle
+
+main = sh $ do
+  homedir <- home
+  subdir <- ls $ homedir </> ".vscode-server/bin/"
+  let nodepath = subdir </> "node"
+  badnode <- isNotSymbolicLink nodepath
+  if badnode
+    then do
+      mv nodepath (subdir </> "node_backup")
+      symlink "/run/current-system/sw/bin/node" nodepath
+      echo ("Fixed " <> repr subdir)
+    else do
+      echo ("Already fixed " <> repr subdir)