Feat/sg ensure

[rdkls]

Delete / recreate SG each time
Ideally wouldn't delete if not necessary .. however wanted to be sure that if IP changed the SG got updated

[ArjenSchwarz]

This breaks when you call the endpoint a second time when you have the container running as the security group is attached to the ENI so it can't be deleted. A similar solution that would work is looping over the existing ingress rules and deleting those before adding the current incoming IP. Keep in mind that one use case of the Lambda function is to get the IP of the bastion, which is especially important when the creation timed out due to AWS being slower than usual.