Add docker config example.

README.md

@@ -167,6 +167,8 @@ Create a config file from the sample configuration file:
 engine-api$ cp config/sample/sample-development.engine-api.ini config/engine-api.ini
 # Production
 engine-api$ cp config/sample/sample-production.engine-api.ini config/engine-api.ini
+# Docker
+engine-api$ cp config/sample/sample-docker.engine-api.ini config/docker/engine-api.ini
 ```
 
 Now edit the configuration file. If you trust all the defaults you'll only need to change the database password.
@@ -183,7 +185,7 @@ iptables -A INPUT -p tcp -m state --state NEW -m tcp --dport 8008 -j ACCEPT
 Then configure the type of federation. Depending on how you want to run your
 Engine API node and where it is deployed, you'll needed to uncomment one of these federation sections:
 
-> To avoid any malfunction it is important that any other node-type configurations are commented out.
+> To avoid any malfunction it is important that any other node-type configuration is commented out.
 
 #### Engine 1 Node