bastn support

[amitu]

Sometimes the APIs, Endpoints or Database you are using to make processor or endpoint request to runs inside your infrastructure, on more than one IPs etc. To improve security, you can create a bastn server that we ship as part of fastn project, on your infra, and fastn will make secure connection with your bastn server, and bastn server will in turn make http/sql requests to services running in your VPC.

To activate this we will use FASTN_BASTN_URL header, if this header is set we will activate bastn mode for the site.