optimize docker build

.dockerignore

@@ -1,18 +1,33 @@
-/.circleci
-/.git
+.idea
 .settings
-/nodes_modules
-/vendor
-/docker-compose.*
-/Dockerfile
+/*.md
+/.circleci
+/.dockerignore
 /.env
 /.env.*
-/*.md
+/.git
 /.travis.yml
+/AUTHORS
 /CONTRIBUTORS
+/Dockerfile
 /LICENSE
-/www/thumbnails
-/www/assets
-/www/custom
+/bin
+!/bin/console
+!/bin/developer
+!/bin/setup
+/cache
 /config/configuration.yml
 /config/configuration-compiled.php
+!/config/configuration.sample.yml
+/datas
+/docker-compose.*
+/logs
+/nodes_modules
+/plugins
+/tmp
+/vendor
+/www/assets
+/www/custom
+/www/plugins
+/www/thumbnails
+npm-debug.log