Update docker-compose config

Author: HarlemSquirrel

ci-run.sh

@@ -3,5 +3,5 @@
 set -e
 
 gem install bundler
-bundle check || bundle install --frozen
+bundle check || bundle install
 bundle exec rake ci

docker-compose.yml

@@ -35,5 +35,5 @@ services:
     networks:
       integration_test_network:
     volumes:
-      - .:/code:ro
+      - .:/code
     working_dir: /code