Update LICENSE
separate security groups for inst and lbs

Issue #22

Still relies on configuration - doesn’t auto-configure rules.
log repo path
specify local branch to deploy
fix x-forwarded-* header propagation

Issue #21

Need to update nginx config anytime dokku might update it.
remove extra line break
wip: private subnet support

Issue #14

Work-in-progress

- Launch instances in private subnet, while load balancers are in
public subnet.
- Connect to instances in private subnet through a bastion machine
(TODO auto-create bastion machine).
- VPC also must already be configured (TODO auto-configure VPC).
- Currently forces this behavior (TODO should be optional).