Remove vestigial `containerPort: 443` from the frontend Deployment

Composed by Devin:

The frontend container declares containerPort: 443 at deploy/helm/thecombine/charts/frontend/templates/deployment-frontend.yaml:69, but nothing inside the container listens on 443:

• nginx's active config listens only on 80 (nginx/templates/default.conf.template:2).
• TLS is terminated at the Kubernetes Ingress, not the frontend container (docs/deploy/kubernetes_design/README.md:143-147).
• The only listen 443 is in nginx/templates/url_moved.conf:17-18, which lacks the .template suffix and isn't processed into an active server block.

containerPort is informational, so this is harmless dead config — a cleanup, not a bug.

Change: remove the - containerPort: 443 line at deploy/helm/thecombine/charts/frontend/templates/deployment-frontend.yaml:69.

Confirm first: no Service/Ingress targets the pod's 443, and nginx/templates/url_moved.conf isn't wired to an active 443 listener.

Start with deploy/helm/thecombine/charts/frontend/templates/deployment-frontend.yaml and inspect the Service and Ingress to confirm nothing targets pod port 443. Check nginx/templates/default.conf.template and nginx/templates/url_moved.conf as described. Done means removing the containerPort: 443 line and confirming the remaining active configuration uses port 80 with TLS handled by the Ingress.