Add docker container definition

Change-Id: If32020e6b8e8bb816eb54533554b18cc5302b5c9
diff --git a/.gitignore b/.gitignore
index 9672757..2bb202b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
-credentials.php
+docker-compose.yml
+.env