feat(serverless): add note on http redirection

Author: cyclimse

serverless/containers/how-to/secure-a-container.mdx

@@ -100,6 +100,22 @@ Set `privacy = "private"` in your Terraform [resource description](https://regis
 
 You can generate access credentials to inject in other applications, such as containers and functions, directly from Terraform using the [container_token resource](https://registry.terraform.io/providers/scaleway/scaleway/latest/docs/resources/container_token).
 
+## Redirect HTTP to HTTPS
+
+You may not want to expose your container over HTTP. You can enable HTTP to HTTPS redirection to ensure that all traffic follows a secure path.
+
+### Configure redirection using the Scaleway console
+
+1. Click **Containers** in the **Serverless** section of the side menu. The containers page displays.
+2. Click the relevant container namespace.
+3. Click the name of the container for which you want to enable redirection.
+4. Click the **Security** tab.
+5. Set the **HTTPS connections only** switch to **On**.
+
+### Configure redirection using the Serverless framework
+
+Set `httpOption: redirected` in your container's description to enable redirection.
+
 ## Set up alerts in Observability Cockpit (upcoming feature)
 
 Using Scaleway [Observability Cockpit](/observability/cockpit/quickstart/), a managed Grafana solution to which all your containers are connected, you can: