Fix up .travisci.yml

.travis.yml

@@ -1,15 +1,22 @@
+dist: trusty
+sudo: required
+
+services:
+  - docker
+
 env:
   DOCKER_COMPOSE_VERSION: 1.22.0
 
+addons:
+  apt:
+    packages:
+      - docker-ce
+
 before_install:
-  - sudo apt-get update
-  - sudo apt-get install -o Dpkg::Options::="--force-confold" --force-yes -y docker-engine
-  - docker-compose --version
   - sudo rm /usr/local/bin/docker-compose
   - curl -L https://github.com/docker/compose/releases/download/${DOCKER_COMPOSE_VERSION}/docker-compose-`uname -s`-`uname -m` > docker-compose
   - chmod +x docker-compose
   - sudo mv docker-compose /usr/local/bin
-  - docker-compose --version
   - docker-compose build
   - docker-compose start
   - docker ps