diff --git a/README.md b/README.md
index f488f03..41a1f2c 100644
--- a/README.md
+++ b/README.md
@@ -13,6 +13,13 @@
 
 ## Development Notes
 
+## Create `ftest` Docker subnet before running tests or deploying
+
+```bash
+docker network create --attachable -d bridge ftest
+```
+
+
 ### Test Runner
 
 Choice of test runner should not be hard-codded, it should be possible to