Updated Configuration and usage (markdown)

Configuration-and-usage.md

@@ -48,6 +48,13 @@ limits:
     parallel: 1  # time and memory limits are merged
     disk-size: 50
     disk-files: 5
+    environ-variable:
+        ISOLATE_BOX: "/box"
+        ISOLATE_TMP: "/tmp"
+    bound-directories:
+        - src: /tmp/isoeval/eval_5
+          dst: /evaluate
+          mode: RW,NOEXEC
 ```
 
 ### Running worker