Create auto deploys for staging (#171)

https://csclub.uwaterloo.ca/~a3thakra/csc/main/

Reviewed-on: www/www-new#171
Co-authored-by: Aditya Thakral <a3thakra@csclub.uwaterloo.ca>
Co-committed-by: Aditya Thakral <a3thakra@csclub.uwaterloo.ca>

.drone.yml

@@ -30,6 +30,19 @@ steps:
   commands:
   - npm run export
 
+- name: deploy (staging)
+  image: node:16
+  depends_on:
+  - export
+  environment:
+    TOKEN:
+      from_secret: STAGING_TOKEN
+  commands:
+  - 'curl -XPOST -H "Authorization: $TOKEN" "https://csclub.uwaterloo.ca/~a3thakra/update-csc/"'
+  when:
+    branch:
+    - main
+
 trigger:
   event:
     exclude: