fix Makefile to build docker plugin

[davecramer]

bring docker example run.sh up to date

fixes #43

[Illydth]

@davecramer I assume this only brings the run.sh up to date to actually execute a docker plugin. As I don't see any code being put into docker.so in this PR, I assume that using "watch" without Kube or OpenShift is still a non-starter correct?

It's been a couple weeks since I was deep into this and at this point am unsure what I did with the existing code set I was working with to initially produce the problem reported in #43 so I'm trying to figure out if this PR actually fixes the issue that PGWatch used with docker SegFaults when run or if this PR actually does make watch functional in a normal docker/non kube environment?

Looking at the changes it doesn't look like it...

[abrightwell]

@Illydth - you are correct. Until the docker plugin is implemented this project only supports failover in a kube/openshift environment. I've created issue #49 in the hopes that it will be completed in a future version. To avoid any obvious confusion, we should temporarily remove any references to docker until it is minimally supported.

[davecramer]

We are of course encouraging Pull Requests!

[jmccormick2001]

thanks, I think at this point I'll close this PR out since it doesn't really do much towards a Docker implementation, if someone wants to do a PR with the implementation I'll be happy to review.