create-a-container: Allow port publishing via create a container with nginx

[runleveldev]

Issue: Support multi-service configuration in /containers/create and /containers/:id/edit routes

Description:
Current container creation and editing routes only support a single service definition. This limits flexibility for containers that expose multiple endpoints or protocols.

Recommendation:
Extend both /containers/create and /containers/:id/edit to allow defining multiple services of different types:

• HTTP (proxied via Nginx reverse proxy)
• TCP/UDP (forwarded via Nginx stream configuration)

Benefits:

• Enables complex container deployments with multiple exposed ports
• Unifies configuration for web and non-web services
• Improves compatibility with multi-service applications and microservice patterns

[runleveldev]

Completed by #113