add multiple script steps to trigger matrix across docker files

Author: CaseyFaist

.travis.yml

@@ -8,7 +8,9 @@ before_script:
   - gem install bundler -v 1.16.2
   - bundle exec hatchet ci:setup
 
-script: docker build --pull --file $(pwd)/${DOCKERFILE} .; docker run --rm -e "STACK=heroku-18" bash $TESTFOLDER
+script:
+  - docker build --pull --file $(pwd)/Dockerfile .; docker run --rm -e "STACK=heroku-18" bash $TESTFOLDER
+  - docker build --pull --file $(pwd)/Dockerfile.heroku-18 .; docker run --rm -e "STACK=heroku-18" bash $TESTFOLDER
 
 jobs:
   include:
@@ -26,10 +28,13 @@ env:
     - TESTFOLDER=test/run-features
     - DOCKERFILE=Dockerfile.heroku-18
     - DOCKERFILE=Dockerfile
+    - CI_NODE_INDEX=0
+    - CI_NODE_INDEX=2
   global:
     - HATCHET_RETRIES=3
     - IS_RUNNING_ON_CI=true
     - HATCHET_APP_LIMIT=5
     - HATCHET_DEPLOY_STRATEGY=git
+    - CI_NODE_TOTAL=2
     - secure: yjtlPE5FbVxTKnjUy/tZUBgSEf4qADD3QOxtgziuid73S0U/1IEXlMGFULsQzIjtlHKmHeywZqpVVEpthIH4RuT7uoX1Pb7SSM/g0T8fT3VoEFbFK1uYl0oZQbUS4Klxv9tPiumj8if3m6ULEGIz1X0wZcMOC0tMLwVCnwmap0E=
     - secure: ZeFTHWwnpIKE9nAqs88ocmiQh7bKce84lilGm5J23nf3N6V4wNyLwqlkvsM008WGBCaOg9AUx7ZunasT0ANsR5gLP3eV2UUg7ILdRgV2Gy13eNRFheC4PHdN92RqQ3aKoqlIv2K999xlhVjod0NzhkQQXB6PddfQINbuU7ks6As=