updates

README.md

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+NixOS Configuration for AppDaemon Development
+
+Needs a `git.nix` file. Example below:
+
+```shell
+{ ... }:
+{
+  programs.git = {
+    enable = true;
+    extraConfig.credential.helper = "store --file ~/.git-credentials";
+    userName = "John Lancaster";
+    userEmail = "32917998+jsl12@users.noreply.github.com";
+  };
+}
+```