Docker support: Dockerfile and docker-compose.yml

[ftoppi]

Hello,

here are a basic Dockerfile and a docker-compose.yml to run this app.

$ docker compose up
[+] Running 1/0
 ✔ Container llm-answer-engine-lae-1  Recreated                                                                                                                                                          0.0s
Attaching to lae-1
lae-1  | $ next dev
lae-1  |    ▲ Next.js 14.1.2
lae-1  |    - Local:        http://localhost:3000
lae-1  |
lae-1  | Attention: Next.js now collects completely anonymous telemetry regarding usage.
lae-1  | This information is used to shape Next.js' roadmap and prioritize features.
lae-1  | You can learn more, including how to opt-out if you'd not like to participate in this anonymous program, by visiting the following URL:
lae-1  | https://nextjs.org/telemetry
lae-1  |
lae-1  |  ✓ Ready in 1869ms
lae-1  |  ○ Compiling / ...
lae-1  |  ✓ Compiled / in 6.5s (1589 modules)
lae-1  |  ✓ Compiled in 317ms (470 modules)