feat(helm): Add self-hosting Helm chart for Svix webhook service

[adityawdubey]

Motivation

Svix does not provide an official or supported Helm chart for self-hosting. Users looking to deploy Svix on Kubernetes must manually provision the backend, database, Redis, and other components, often leading to fragmented, error-prone, or insecure setups.

This makes it harder for DevOps teams to adopt Svix in environments where Kubernetes and Helm are standard deployment tools. Without a reusable Helm chart, managing upgrades, scaling, or secure configuration becomes more difficult and inconsistent across teams.

Solution

This PR introduces a fully functional Helm chart to deploy the entire Svix webhook stack on Kubernetes. It includes:

• Templates for the Svix backend, PostgreSQL, PgBouncer, and Redis
• Support for external database endpoints
• Configurable values for secrets and resourcesBuilt-in health checks
• Built-in health checks, service definitions, and PVC support
• Horizontal Pod Autoscaler (HPA) for svix-backend based on CPU and memory utilization, enabling automatic scaling under load
• A comprehensive README.md with deployment guidance and production best practices
• Added .gitignore for Helm chart to exclude rendered files and secrets

This addition allows users to self-host Svix reliably, reproducibly, and securely using Helm — supporting both local testing and production deployments out of the box.

[emouawad]

Thanks @adityawdubey - will try this chart as it looks there are no plans for an official chart

[svix-james]

Hi! Apologies for the delay in response here. We intend to release a chart sometime soon. We already have a chart for Enterprise customers, so we will likely make a modified version of that available publicly in the near future rather than start with the version offered here. Nevertheless, we appreciate the contribution!

[darthmanfro]

Hi!
I was wondering if there are any updates regarding the modified public Helm Chart mentioned in the recent comments. We are planning our infrastructure deployment and would love to know if there is an estimated release window for it.
Thank you for your time and efforts on this!