message: Adds alpha warning to wrangler dev
diff: @@ -42,6 +42,7 @@ pub fn dev(
  ip: Option<&str>,
  verbose: bool,
  ) -> Result<(), failure::Error> {
  + print_alpha_warning();
  commands::build(&target)?;
  let server_config = ServerConfig::new(host, ip, port)?;
  let session_id = get_session_id()?;
  @@ -84,6 +85,18 @@ pub fn dev(
  })
  }
  +fn print_alpha_warning() {
  + println!(
  + "{} wrangler dev is currently unstable and there are likely to be breaking changes.",
  + emoji::WARN
  + );
  + println!(
  + "{} For this reason, we cannot yet recommend using wrangler dev for integration testing.",
  + emoji::WARN
  + );
  + println!("\n{} Please submit feedback for wrangler dev here: https://github.com/cloudflare/wrangler/issues/1047\n", emoji::INFO);
  +}
  +
  async fn serve(
  server_config: ServerConfig,
  preview_id: Arc<Mutex<String>>,
  