local-development.md

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 ```
 follow the Dockerfile to the end.
 
-Go to [Testing](testing) if you need further information
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+# Debugging
+
+You may have non-functional foris-controller code. When you run such code on router, you may not be able to determine where the issue is. One way is to set
+
+```
+uci set foris-controller.main.debug='1'
+```
+otpion to log debug oinformation to `` /var/log/messages``.
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