Simplifies things greatly!

Also make NOMAD_ADDR_* use host ip:port for consistency. NOMAD_PORT_*
varies based on port map and the driver IP isn't exposed as an env var
as the only place it can be used is in script checks anyway.

Ideally DriverNetwork would be fully populated in Driver.Prestart, but
Docker doesn't assign the container's IP until you start the container.

However, it's important to setup the port env vars before calling
Driver.Start, so Prestart should populate that.

Fix path used by Nomad Server HTTP Check

This package no longer exists so trying to install it broke our build.
It has been renamed docker-ce.

Fixes #2701

Explain term signal behavior for Docker tasks

Fix typo in job-dispatch docs.

canidate -> candidate.

Fix typos

Fix documentation of -tail/-f

Previously, -tail is erroneously documented as -f and -f and -n are not documented at all. 

This patch fixes both.

update middleman version 25 to 26

Fix port map interpolation for docker

Add no overlay option