Export struct members of GatewayConfig{}

Add env configurable readTimeout / writeTimeout
Add env-timeout test
Modify appropriate Dockerfiles

Signed-off-by: leigh schrandt <leigh@null.net>

- fix javascript deserialization in UI with json response
-  create swarm watcher to monitor replicas

Document sample functions with comments
Allow functions with 0-9 for route regex

Introduce prometheus_alertmanager into stack - have it fire into webhook stash

* - Extend stack to include a test function
* - Allow _ char in routes
* - Let Dockerfile shrink by coming from alpine

* Update build.sh

* Document stack deploy

* Update README.md

* fix port in README (#3)

- Allow _ char in routes
- Let Dockerfile shrink by coming from alpine

Add first Alexa-compatible function HostnameIntent