Infra cluster config

[liviaUeno]

Summary

Adds Kubernetes manifests and build tweaks to deploy the customized Element Web client to the cluster, alongside the existing Synapse/Postgres setup.

Changes

• Add element.yaml (Deployment) and element-service.yaml (NodePort Service) to run the Element image in the cluster
• Pin a fixed build version in scripts/docker-package.sh to avoid the git-based version lookup, which fails when the js-sdk is not a git checkout
• Use config.sample.json as the baked-in config so the custom config ships in the image

How to run

1. Build the image from the monorepo root:
   docker build -t element-grupos -f apps/web/Dockerfile .
2. Load it into minikube: minikube image load element-grupos
3. Apply the manifests: kubectl apply -f element.yaml -f element-service.yaml
4. Port-forward and open http://localhost:8080