Comment by benburkert

we're going to say more about how lcl.host works between containers in the future since it ends up pulling in Anchor's package features, but I can give a quick rundown of what we've done in the past with docker-compose: start a service in container A and expose port 44300, and configure the service with an ACME client to provision a `service-a.lcl.host` certificate. The clients in that container won't trust the cert, but that no problem, since your system/browser will trust the cert if you've run `anchor lcl`. In container B, install an anchor built package for the language of the server, and setup the HTTPS/TLS client to use the set of CAs in that package. Now app B can connect to `service-a.lcl.host:443300` over HTTPS/TLS.