ADD README

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>

README.md

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+## fstail
+
+Unfortunately, `tail -f /logs/*` may not do what you want it to do.
+
+Bash will expand `*` to all existing files within `/logs/` and then show the extra lines added to each of them.
+
+**What if you want to include newly created files too?**
+
+`fstail` uses the fsnotify mechanism to detect both new and existing files, then starts printing their contents as and when they are written to.
+
+### Usage
+
+Tail the current directory:
+
+```
+cd /var/log/
+fstail
+```
+
+Tail files in a given directory:
+
+```
+/var/log/nginx/
+```
+
+## License
+
+Copyright Alex Ellis 2023
+
+MIT license.