v0.4.0 🌶️ [chili pepper]

• 🎉 performances: more than x 2 🚀. I want to give a shout-out to @nilslice. This was possible thanks to his advice on how to usesync.Mutex.
• update of HDK 0.0.4 then 0.0.5.
• capsule-http: add of 2 endpoints (/metricsand /health) triggering the OnMetrics and OnHealthCheck functions of the WASM module.
• new recipe: how to deploy Capsule FaaS on a OVH-Cloud Compute instance (a huge thank you to @titimoby for providing the hosting https://faas.capsule.foundation/), read the recipe here: https://bots-garden.github.io/capsule/capsule-http-ovh-deploy/