deploy-sourcegraph-docker should bundle in Prometheus/Jaeger

Created by: slimsag

Our Kubernetes deployments standardize on making use of Prometheus/Jaeger and it is quite nice because it allows our users to more easily monitor cluster health and allows us to better debug what is going wrong in the event of e.g. perf problems.

In deploy-sourcegraph-docker, we should do the same such that deploy.sh automatically spins up these tools configured properly.