Documentation Revamp

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

docs/content/middlewares/retry.md

@@ -0,0 +1,20 @@
+# TODO -- Retry
+
+Retrying until it Succeeds
+{: .subtitle }
+
+## Old Content
+
+## Retry Configuration
+
+```toml
+# Enable retry sending request if network error
+[retry]
+
+# Number of attempts
+#
+# Optional
+# Default: (number servers in backend) -1
+#
+# attempts = 3
+```