diff --git a/Configuration.md b/Configuration.md
index fe4d5d3..67b9566 100644
--- a/Configuration.md
+++ b/Configuration.md
@@ -1 +1,21 @@
-Coming soon
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+## Environment variables
+
+### XUI_LOG_LEVEL
+* Description: none
+* Type: `debug` | `info` | `warn` | `error` (**`string`**)
+* Default value: `info`
+
+### XUI_LOG_LEVEL
+* Description: none
+* Type: `debug` | `info` | `warn` | `error` (**`string`**)
+* Default value: `info`
+
+### XUI_LOG_LEVEL
+* Description: none
+* Type: `debug` | `info` | `warn` | `error` (**`string`**)
+* Default value: `info`
+
+### XUI_LOG_LEVEL
+* Description: none
+* Type: `debug` | `info` | `warn` | `error` (**`string`**)
+* Default value: `info`
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