Start social-fasting app

I'd like to ensure that my /etc/hosts file blocks websites at certains times. I
use this to allow / disallow websites at various times of the day.

TODO:
- Add project README
- Add tests
- Publish
- Create a Nix derivation
- Run as a systemd timer unit
- Figure out if I can run this as a user rather than root

tools/website-blocker/rules.json

@@ -0,0 +1,26 @@
+[
+  {
+    "urls": [
+      "facebook.com",
+      "www.facebook.com",
+      "twitter.com",
+      "www.twitter.com",
+      "youtube.com"
+      "www.youtube.com"
+      "instagram.com"
+      "www.instagram.com"
+    ],
+    "allowed": []
+  },
+  {
+    "urls": [
+      "chat.googleplex.com"
+    ],
+    "allowed": [
+      {
+        "day": "Tuesday",
+        "timeslots": []
+      }
+    ]
+  }
+]