Docker build instruction in README, circle-ci can build and push the two images

README.md

@@ -9,7 +9,7 @@ Phraseanet 4.1 - Digital Asset Management application
  - RestFull APIS
  - Elasticsearch search engine
  - Multiple resolution assets generation
- 
+
 # Documentation :
 
 https://docs.phraseanet.com/
@@ -32,7 +32,7 @@ https://www.phraseanet.com/download/
 
 For development purpose Phraseanet is shipped with ready to use development environments using vagrant.
 
-- git clone 
+- git clone
 - vagrant up
 
 
@@ -43,4 +43,20 @@ For development with Phraseanet API see https://docs.phraseanet.com/4.0/en/Devel
 Phraseanet is licensed under GPL-v3 license.
 
 
+# Docker build
+
+The docker distribution come with 2 differents containers :
+* an nginx that act as the front http server.
+* the php-fpm who serves the php files through nginx.
+
+## How to build
+
+The two images can be built respectively with these two commands :
+
+    # nginx server
+    docker build --target phraseanet-nginx -t phraseanet-nginx .
+
+    # php-fpm application
+    docker build --target phraseanet -t phraseanet .
+