only run shippable UI for devel and release branches

tools/docker-compose/unit-tests/Dockerfile

@@ -1,5 +1,4 @@
-ARG TAG=latest
-FROM gcr.io/ansible-tower-engineering/awx_devel:$TAG
+FROM gcr.io/ansible-tower-engineering/awx_devel:latest
 
 # For UI tests
 RUN yum install -y bzip2 gcc-c++

tools/docker-compose/unit-tests/docker-compose-shippable.yml

@@ -0,0 +1,14 @@
+---
+version: '3'
+services:
+  unit-tests:
+    build:
+      context: ../../../
+      dockerfile: tools/docker-compose/unit-tests/Dockerfile
+    image: gcr.io/ansible-tower-engineering/unit-test-runner:${GIT_BRANCH:-latest}
+    environment:
+      SWIG_FEATURES: "-cpperraswarn -includeall -I/usr/include/openssl"
+      TEST_DIRS: awx/main/tests/functional awx/main/tests/unit awx/conf/tests awx/sso/tests
+    command: ["make test"]
+    volumes:
+      - /awx_devel:/awx_devel