Update README.md

Author: takayukioda

README.md

@@ -28,3 +28,24 @@ If you want to change compile option or etc, please edit [codecheck.yml](codeche
 (If you change output filename, you have to change env/APP_COMMAND section too.)
 
 You can build pure C application by switching compiler command from `c++` to `clang`.
+
+## For local exam using GitHub
+To use codecheck command in your local environment, you need to modify [codecheck.yml](./codecheck.yml) in order to run test properly.
+
+```yaml
+# Before
+build:
+  - c++ -o theapp.o src/*.cpp
+env:
+  APP_COMMAND: ./theapp.o
+test: mocha
+```
+
+```yaml
+# After
+build:
+  - c++ -o theapp.o "src/*.cpp"
+env:
+  APP_COMMAND: ./theapp.o
+test: mocha
+```