Add some basic feedback for the bot (#37)
Add some basic feedback for the bot (#37)

## Why are we doing this?

This improves two ways I currently debug the bot:
* loading the homepage. Previously, it would 404, which is a bit ambiguous from localtunnel not connected. Now it's a http 200 and you get a 👍
* send a message. Previously, it would hit whatever path (typically, just echo it back). Now there's an explicit "ping" command that replies back with "pong".

## Did you document your work?

It's for debugging, so I don't think these changes need to get into the README

## How can someone test these changes?

Steps to manually verify the change:

1. deploy
2. visit the homepage:
  1. locally: localhost:3000
  2. your localtunnel. mine is https://makewebhooksgreatagain.localtunnel.me/
3. message the bot with `ping` you should see a `pong` reply

## What possible risks or adverse effects are there?

none. a technically savvy user could type "ping" and see a dev response, but that's probably a good thing.

## What are the follow-up tasks?

copy edits? for example pong could be more excited: "pong!"

## Are there any known issues?

no

## Did the test coverage decrease?

new code is covered.
CondeNast/launch-vehicle-fbm