Add folder to keep track of misc. scripts

scripts/.gitignore

@@ -0,0 +1 @@
+credential.json

scripts/README.md

@@ -0,0 +1,18 @@
+# Scripts
+
+This folder contains miscellaneous scripts that interface with the Firebase
+Admin SDK to perform one-off administrative functions. To run these scripts, you
+need to have the secret key credentials corresponding to a service account,
+which can be done by admin users following the
+[instructions here](https://firebase.google.com/docs/admin/setup). Download the
+secret, and save it to a file in this folder called `credential.json`.
+
+After downloading the credentials file, you can run scripts with `npm install`
+and `npm start`.
+
+## Structure
+
+The scripts are written in Node.js as functions and have access to the
+`firebase-admin` SDK. The entry point is `src/index.js`, which imports and lists
+all of the functions. These files might be somewhat messy, but it's better to
+track these tools somewhere than to not keep them at all.