simplify docker commands

.travis.yml

@@ -5,7 +5,7 @@ jobs:
         - docker
       language: generic
       before_install: docker pull cartoimages/engine-xenial-pg101
-      script: docker run -e POSTGIS_VERSION=2.4 -v `pwd`:/srv cartoimages/engine-xenial-pg101 bash run_tests_docker.sh
+      script: npm run docker-test
     - dist: precise
       addons:
         postgresql: "9.5"

docker/reference.md

@@ -17,7 +17,3 @@ After running the tests with docker, you will need Docker installed and the dock
     - `docker tag cartoimages/engine-xenial-pg101 cartoimages/engine-xenial-pg101`
   - Upload: 
     - `docker push cartoimages/engine-xenial-pg101`
-
-
-## Useful commands 
-We have some useful commands created in package.json

package.json

@@ -65,10 +65,8 @@
     "preinstall": "make pre-install",
     "test": "make test-all",
     "update-internal-deps": "rm -rf node_modules && rm -f yarn.lock && yarn",
-    "docker-pull": "docker pull cartoimages/engine-xenial-pg101",
     "docker-test": "docker run -v `pwd`:/srv cartoimages/engine-xenial-pg101 bash run_tests_docker.sh && docker ps --filter status=dead --filter status=exited -aq | xargs -r docker rm -v",
-    "docker-bash": "docker run  -it -v `pwd`:/srv cartoimages/engine-xenial-pg101 bash",
-    "docker-build": "docker build -t cartoimages/engine-xenial-pg101 -f docker/Dockerfile-xenial-pg101 docker/"
+    "docker-bash": "docker run  -it -v `pwd`:/srv cartoimages/engine-xenial-pg101 bash"
   },
   "engines": {
     "node": ">=6.9",