mirage/mirage-skeleton: PR #347: Add an example about HTTP server (including ALPN negocitation)

@76615ab

Stages:

• 🟠 x86_64-debian-10-4.13
• ✔️ arm64-debian-10-4.13 (5m15s)

History:

• 21/10/2022 12:04 🟠 @76615ab (5m15s)
• 21/10/2022 09:50 ✔️ @1c28fe6 (11m53s)
• 21/10/2022 09:45 🟠 @684df59
• 21/10/2022 09:18 ❌ @579d6ea (9m53s)
• 21/10/2022 09:07 ❌ @7548725 (5m48s)
• 21/10/2022 09:00 🟠 @3cd8f16
• 20/10/2022 17:15 ✔️ @55a3fd9 (20m36s)