EPIC: Prepare the repo for `public` share on `HN` 🚀

@LuchoTurtle you've done a _superb_ job of building a _fully functional_ image captioning app! 😍 🎉
Now it's time to get some `credit` for it 💳 😉 by submitting a "**Show HN**" :shipit:
And in the process **raise your `public` profile** for applying to `#NextAdventure` 🚀

# Todo

+ [x] Address the start-up time (currently `25sec`): https://github.com/dwyl/image-classifier/issues/20
+ [ ] And/or create an endpoint to serve a `1x1px GIF` to start the app _proactively_ when someone is reading the `README.md` ref: https://github.com/dwyl/ping/issues/7

+ [x] Improve the `Why?` section of `README.md` to answer the Reader's question succinctly.

Currently it's: https://github.com/dwyl/image-classifier/tree/a3c8c3bf79a0f5e7bca160b6e460d883bc6e3973#why-

This is _good_ for an _internally-focussed_ tutorial for _us_ ... 👍
but as an LLM-curious person casually reading on `HN`, 👀
this isn't going to "hook" me into reading a `5k word` tutorial for `30+ mins` ... ⏳

```md
# Why? 💭

We needed a fully-offline capable (no 3rd party APIs/Services) image captioning service
using a state-of-the-art pre-trained image model to describe images uploaded in our
[`App`](https://github.com/dwyl/app).

# What?

A step-by-step tutorial building a fully functional
`Phoenix LiveView` web application that allows anyone
to upload an image and have it described
by the `Open Source` `BLIP` image captioning (`Large`) model.

```

+ [x] Simplify layout of homepage of the App and add _examples_: https://github.com/dwyl/image-classifier/issues/7
+ [x] _Prepare_ Intro/Demo `GIF`: https://github.com/dwyl/image-classifier/issues/21
+ [x] Add demo `GIF` to intro of `README.md`
+ [x] `GIF` should be below the `badges` and _above_ the `TOC`:

+ [ ] Record Tutorial `Video`: #23

## Part 2

+ [ ] Study the 20 most successful "Show HN" posts: https://hn.algolia.com/?query=show+hn&sort=byPopularity (spend 1-2 mins skimming each one to extract the info - or use `ChatGPT` to do some pre-analysis if you think it will be useful ...)
Summarise what you learned as comments in this issue thread. 💬 🙏

+ [ ] Carefully craft your `Show HN` Title to maximise its chance of success. 💭
+ [ ] Share on https://elixirforum.com/ to get some initial traction/stars.
+ [ ] As soon as you submit on HN, update the `Elixir Forum` topic to include the `HN` link to drive up-votes.
+ [ ] Submit your `Show HN`!! 🚀
+ [ ] Share the link so we can up-vote it. 🔗 ⬆️
+ [ ] Get _everyone_ you know to up-vote it so it gets and initial boost. 📈