Update README.md

README.md

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 # stocheck
 quick and dirty smart value checker
+
+### features: 
+- sata/nvme support
+- show smart info and self-check results
+
+# usage
+Usage: stocheck (options) <br>
+Options: <br>
+ -h/--help -- show help <br>
+ -u/--update -- update the script <br>
+
+# installation
+1. download the script: <br>
+```bash
+wget https://git.byreqz.de/byreqz/stocheck/raw/branch/main/stocheck.sh
+```
+2. run it with <br>
+``
+bash stocheck.sh
+``
+or <br>
+``
+chmod +x stockheck.sh && ./stocheck.sh
+``
+3. optionally alias it <br>
+``alias stocheck="~/stocheck.sh"``