add compose regression to ci

to prevent any regressions, we should be running regression tests using
compose.

Signed-off-by: baude <bbaude@redhat.com>

test/compose/env_and_volume/read/app.py

@@ -0,0 +1,10 @@
+from flask import Flask
+app = Flask(__name__)
+
+@app.route('/')
+def hello():
+    f = open("/data/message", "r")
+    return f.read()
+
+if __name__ == '__main__':
+	app.run(host='0.0.0.0')