fix docker-compose, fix versions & prepare ontology update

docker/Dockerfile

@@ -1,4 +1,4 @@
-FROM php
+FROM php:7.2
 MAINTAINER Conjecto <contact@conjecto.com>
 
 RUN apt-get update && apt-get install -y \

docker/app/composer.json

@@ -8,6 +8,6 @@
     ],
     "require": {
         "php": "^7.0",
-        "datatourisme/api": "^1.0"
+        "datatourisme/api": "dev-feature/ontology-v2"
     }
 }