*: cleanup containers generated during tests to avoid deploy conflicts

.travis.yml

@@ -34,6 +34,7 @@ script:
   - ./test-functional
   - DEX_TEST_DSN="sqlite3://:memory:" ./test-functional
   - ./build-docker
+  - ./build-docker clean
 
 deploy:
   provider: script

build-docker

@@ -35,7 +35,17 @@ push() {
   docker push $repo:latest
 }
 
-build
-if [[ "push" == "$1" ]]; then
-  push
+clean() {
+  docker rmi $repo:$version
+  docker rmi $repo:latest
+}
+
+if [[ "clean" == "$1" ]]; then
+  clean
+else
+  build
+  if [[ "push" == "$1" ]]; then
+    push
+  fi
 fi
+