maybe this will work

devsnek · devsnek · commit 7a0ebb12d233 · 2019-08-28T18:31:55.000-05:00
diff --git a/now.json b/now.json
@@ -6,7 +6,9 @@
       "src": "/api/gist",
       "dest": "/api/gist.js",
       "headers": {
-        "Access-Control-Allow-Headers": "content-type"
+        "Access-Control-Allow-Origin": "https://engine262.js.org",
+        "Access-Control-Allow-Headers": "content-type",
+        "Access-Control-Allow-Methods": "POST"
       }
     },
     {

Original file line number	Diff line number	Diff line change
`@@ -6,7 +6,9 @@`
`6`	`6`	`"src": "/api/gist",`
`7`	`7`	`"dest": "/api/gist.js",`
`8`	`8`	`"headers": {`
`9`		`- "Access-Control-Allow-Headers": "content-type"`
	`9`	`+ "Access-Control-Allow-Origin": "https://engine262.js.org",`
	`10`	`+ "Access-Control-Allow-Headers": "content-type",`
	`11`	`+ "Access-Control-Allow-Methods": "POST"`
`10`	`12`	`}`
`11`	`13`	`},`
`12`	`14`	`{`