Documentation Revamp

Co-authored-by: jbdoumenjou <jb.doumenjou@gmail.com>

docs/content/operations/debug-mode.md

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+# The Debug Mode
+
+Getting More Information (Not For Production)
+{: .subtitle }
+
+The debug mode will make Traefik be _extremely_ verbose in its logs, and is NOT intended for production purposes.
+
+## Configuration Example
+
+??? example "TOML -- Enabling the Debug Mode"
+
+    ```toml
+    [Global]
+       debug = true
+    ```