chore(folio-webApp): pin dev-server port and trim worker logging

webpack-dev-server now binds 8088 (or WEBAPP_PORT) so it doesn't
collide with the docs server on 8080. Drop the per-message reply
log; keep only the OPFS init line and error logging.

examples/folio/app/webApp/webpack.config.d/coopcoep.js

@@ -1,5 +1,6 @@
 config.devServer = {
   ...(config.devServer || {}),
+  port: process.env.WEBAPP_PORT ? Number(process.env.WEBAPP_PORT) : 8088,
   headers: {
     ...((config.devServer && config.devServer.headers) || {}),
     'Cross-Origin-Opener-Policy': 'same-origin',