Updated Debugging (markdown)

Debugging.md

@@ -8,6 +8,23 @@ The `log` package has a function that allows redirection of all logged messages
 
 https://godoc.org/log#SetOutput
 
+Example:
+```go
+f, err := os.Create("debug.log")
+if err != nil {
+    log.Fatal(err)
+}
+log.SetOutput(f)
+```
+
+Now we can add debug statement anywhere in the code like this:
+
+```go
+log.Printf("Debugging: %v", someVar)
+```
+
+The log messages will be written into a file named `debug.log`.
+
 ## Using the text widget.
 
 `Termdash` comes with a `Text` widget which is capable of displaying any text messages. If your application allows it, consider including a separate `Text` widget in your layout and have it display any debug messages directly on the terminal.