Add local configuration steps (#553)

diff --git a/README.md b/README.md
index 54878cf..1367799 100644
--- a/README.md
+++ b/README.md
@@ -23,7 +23,7 @@
 ```
 
 The dart-services v2 API is defined in terms of Protobuf, which requires
-the installation of the Protobuf `protoc` compiler. Please see 
+the installation of the Protobuf `protoc` compiler. Please see
 [Protocol Buffers](https://developers.google.com/protocol-buffers/)
 for detailed instalation instructions.
 
@@ -47,6 +47,14 @@
 
 ## Testing
 
+Flutter is bundled with the project and requires the following commands to be executed to configure the bundled version:
+
+```bash
+flutter/bin/flutter doctor
+flutter/bin/flutter config --enable-web
+flutter/bin/flutter precache --web --no-android --no-ios --no-linux --no-windows --no-macos --no-fuchsia
+```
+
 To run tests:
 
 `grind test` for unit tests