docs: Add documentation for local-gadget top file.
@@ -239,6 +239,20 @@ docker-init 167857 142428 0 /usr/bin/docker-init --version
...
```
+### Top/File
+
+```bash
+$ sudo local-gadget top file
+CONTAINER PID COMM READS WRITES RBYTES WBYTES T FILE
+test-top-file 139255 sh 0 1 0B 4B R bar
+```
+
+The above output is the result of observing the following test container:
+
+```bash
+$ docker run --rm --name test-top-file busybox /bin/sh -c 'while true; do echo foo > bar; sleep 1; done'
+```
+
### Trace/Bind
```bash
