👷 Improve Playwright CI speed: sharding (paralel runs), run in Docker to use cache, use env vars (#1405)

frontend/tests/utils/mailcatcher.ts

@@ -10,7 +10,7 @@ async function findEmail({
   request,
   filter,
 }: { request: APIRequestContext; filter?: (email: Email) => boolean }) {
-  const response = await request.get("http://localhost:1080/messages")
+  const response = await request.get(`${process.env.MAILCATCHER_HOST}/messages`)
 
   let emails = await response.json()