👷 Add Travis CI build and run

Signed-off-by: mathieu.brunot <mathieu.brunot@monogramm.io>

.travis.yml

@@ -0,0 +1,37 @@
+dist: trusty
+sudo: required
+
+services: docker
+
+language: bash
+
+branches:
+  only:
+    - master
+
+before_script:
+  - env | sort
+  - dir="${VARIANT}/"
+
+script:
+  - cd "$dir"
+  - travis_wait docker build --build-arg VERSION=${VERSION} -t ejabberd/ecs:travis-${VERSION} .
+  - docker images
+  - travis_retry docker run --name ejabberd -d -p 5222:5222 ejabberd/ecs && sleep 60
+  - docke ps
+  - docker logs ejabberd
+  - docker logs ejabberd | grep "Start accepting TCP connections" || exit 1
+
+notifications:
+  email: false
+
+matrix:
+  allow_failures:
+    - env: VERSION=develop VARIANT=mix
+    - env: VERSION=develop VARIANT=mix
+
+env: # Environments
+  - VERSION=19.5 VARIANT=ecs
+  - VERSION=19.5 VARIANT=mix
+  - VERSION=19.2 VARIANT=ecs
+  - VERSION=19.2 VARIANT=mix