Added custom headers option

config.example.yaml

@@ -9,20 +9,28 @@ sites:
     domain: docs.my-lib.com
     deploy_token: "${MY_LIB_DEPLOY_TOKEN}"
     enabled: true
+    not_found_file: 404.html
     forward_rules:
       - source: /npm
         destination: https://www.npmjs.com/package/my-lib
         status_code: 302
-
       - source: ^/docs/v(\d+)$
         destination: https://v$1.docs.my-lib.com/
         status_code: 301
         regex: true
-
       - source: ^/blog/(?P<slug>[^/]+)$
         destination: /posts/${slug}
         status_code: 302
         regex: true
+    custom_headers:
+      - source: /json/* # glob (default)
+        headers:
+          Content-Type: "application/json"
+          Cache-Control: "max-age=7200, must-revalidate"
+      - source: ^/api/v\d+/ # regex opt-in
+        regex: true
+        headers:
+          Cache-Control: "no-store"
 
   - repo: portfolio
     owner: yourname