re-add composer install on dockerBuild

Dockerfile

@@ -23,7 +23,8 @@ RUN chown -R www-data:www-data /var/www
 
 USER www-data
 
-RUN cd /var/www
+RUN cd /var/www && \
+    composer install
 WORKDIR /var/www/
 
 ENTRYPOINT ["bash", "./docker/docker.sh"]

docker/docker.sh

@@ -1,4 +1,3 @@
-composer install
 php bin/console doctrine:database:create
 php bin/console d:m:m --no-interaction
 php bin/console cache:clear