use discord instead of sendgrid

config/server.example

@@ -17,7 +17,7 @@
         }
     ],
     "website": {
-        "sendgrid_key": "<SendGrid API key from https://app.sendgrid.com/settings/api_keys>"
+        "discord_hook": "<Secret Discord Webhook>"
     },
     "minecraft": {
         "world": "main"

config/update.py

@@ -27,8 +27,8 @@ IMAGES = {
 
 def generate(cfg):
     # website
-    with open("website/sendgrid.key", "w") as f:
-        f.write(cfg["website"]["sendgrid_key"])
+    with open("website/discord.txt", "w") as f:
+        f.write(cfg["website"]["discord_hook"])
 
     # minecraft
     shutil.copy("minecraft/server.default", "minecraft/server.properties")