update html opts (#3236)

Co-authored-by: Justin Rhee <jusrhee@Justins-MacBook-Air.local>

dashboard/webpack.config.js

@@ -53,7 +53,7 @@ module.exports = () => {
       template: path.resolve(__dirname, "src", "hosted.index.html"),
       intercomAppId: `${env.INTERCOM_APP_ID}`,
       hotjarId: `${env.HOTJAR_ID}`,
-      posthogKey: `${env.POSTHOG_API_KEY}`,
+      posthogKey: `${process.env.POSTHOG_API_KEY}`,
       intercomSrc: `${process.env.INTERCOM_SRC}`,
       segmentWriteKey: `${process.env.SEGMENT_WRITE_KEY}`,
       segmentKey: `${process.env.SEGMENT_PUBLIC_KEY}`,