add more lenient CSP/COOP headers for preview

vercel.json

@@ -56,6 +56,25 @@
 				}
 			]
 		},
+		{
+			"source": "/(.*)",
+			"missing": [
+				{
+					"type": "host",
+					"value": "unicorn-utterances.com"
+				}
+			],
+			"headers": [
+				{
+					"key": "Content-Security-Policy",
+					"value": "default-src 'self';base-uri 'self';form-action 'self' https://unicorn-utterances.com/ https://app.convertkit.com/;frame-ancestors 'none';frame-src https:;img-src 'self' https: data:;object-src 'none';script-src 'self' 'unsafe-inline' https://vercel.live/;connect-src 'self' https://vercel.live/;style-src 'self' 'unsafe-inline';upgrade-insecure-requests"
+				},
+				{
+					"key": "Cross-Origin-Opener-Policy",
+					"value": "same-origin-allow-popups"
+				}
+			]
+		},
 		{
 			"source": "/(.*)",
 			"headers": [