Docker improve rebased (#450)

* Shortening docker image in ~30%

* Caching bundle, gathering env variables and using newer sintax

* Creating startup script and env file

* Improving travis CI configuration

* Loading assets in production env

* Allow uglifier to interpret ES6

* Don't dettach when building container in travis

* Fix start command

* Fix travis script

* Try to resolve travis tests invocation

* Tweak travis script

* Add delay

* Bundle install before db setup

* Shortening docker image in ~30%

* Caching bundle, gathering env variables and using newer sintax

* Creating startup script and env file

* Improving travis CI configuration

* Loading assets in production env

* Allow uglifier to interpret ES6

* Fix start command

* Fix travis script

* Tweak travis script

* Add delay

* Revert assets changes

* Return to Mysql5.7

* Tweak travis script

* Fix make redeploy-container command

* Add db migrate and precompile step.

* Add bower install to Makefile

* Clean after docker run. Avoid one bower run.

app/assets/javascripts/application.js

@@ -35,8 +35,6 @@
 //= require leaflet-easybutton/src/easy-button.js
 //= require leaflet-toolbar/dist/leaflet.toolbar.js
 //= require leaflet-distortableimage/dist/leaflet.distortableimage.js
-//= require leaflet-easybutton/src/easy-button.js
-//= require leaflet-google/index.js
 //= require sparklines/source/sparkline.js
 //= require glfx-js/dist/glfx.js
 //= require ion-rangeslider/js/ion.rangeSlider.js

app/assets/stylesheets/maps.scss

@@ -1,5 +1,4 @@
 /*
- *= require seiyria-bootstrap-slider/dist/css/bootstrap-slider.min.css
  *= require jquery-ui/themes/overcast/jquery-ui.min.css
  *= require ion-rangeslider/css/ion.rangeSlider.css
 */ 

config/environments/production.rb

@@ -64,7 +64,7 @@
   # config.force_ssl = true
 
   # See everything in the log (default is :info)
-  # config.log_level = :debug
+  config.log_level = :debug
 
   # Prepend all log lines with the following tags
   # config.log_tags = [ :subdomain, :uuid ]