First release with tests

tests/README.md

@@ -0,0 +1,14 @@
+# docker-swarm-autoscaler unit tests
+
+### Dependencies (packaged into docker with ./run-tests.sh)
+#### [uses rspec-shell-expectations](https://github.com/matthijsgroen/rspec-shell-expectations)
+------
+1. Ruby 2.6.3
+2. jq needs installed
+
+### Gotchas
+------
+1. Do not use ${0} in scripts. Instead use ${BASH_SOURCE[0]}
+2. Many times it is necessary to see the stdout and stderr in your test to see what you forgot to mock. For example, if your test is failing
+you can do `expect(stdout).to eq ''` and rspec will fail and give you the stdout message. Same with stderr. This will help you mock the things
+you might have overlooked.