mve slack's bolt to test with localhost.run

app.js

const { App, LogLevel, ExpressReceiver } = require('@slack/bolt');

// this app is by default listening for events/commands/messages/etc on the /slack/events path
const app = new App({
  token: process.env.SLACK_BOT_TOKEN,
  logLevel: LogLevel.DEBUG,
  signingSecret: process.env.SLACK_SIGNING_SECRET,
});

/* Add functionality here */
app.command('/yolo', async ({ command, ack, say }) => {
  // Acknowledge command request
  await ack();
  await say(`${command.text}`);
});



app.error((error) => {
  // Check the details of the error to handle cases where you should retry sending a message or stop the app
  console.error(error);
});

(async () => {
  // Start the app
  await app.start(process.env.PORT || 3000);

  console.log('⚡️ Bolt app is running!');
})();

run this and in another terminal run ssh -R 80:localhost:3000 plan@ssh.localhost.run. Configure the slack command in your app with the https domain name returned from localhost.run and the commains path: https://????.localhost.run/slack/events

This solved my issue. I saw 404 error codes when I tried to create my first slash command. The Slack Bot would simply respond with /command failed with the error "dispatch_failed"

Thank you very much for this tip, I found it at the end of about 8 hours of troubleshooting & searching.

I also found the answer here: https://stackoverflow.com/questions/63665120/slash-command-dispatch-failed/65709852#65709852