diff --git a/captain-definition.json b/captain-definition.json
new file mode 100644
index 0000000..b8b9dd6
--- /dev/null
+++ b/captain-definition.json
@@ -0,0 +1,4 @@
+{
+    "schemaVersion": 2,
+    "dockerfilePath": "./docker/php/Dockerfile"
+}