docs(readme): add the readme

README.md

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+Timeout
+=======
+
+`Timeout` executes a command until the timeout is over.  
+When the command is finished before the timeout then the exit code is `0` else it's `1`.
+
+Usage
+-----
+
+```
+./timeout [-v] [-h] [-t TIMEOUT] [-c COMMAND]
+```
+
+Run `./timeout -h` to get the full help.
+
+### In docker
+
+```
+docker run -it --rm deblan/timeout [-v] [-h] [-t TIMEOUT] [-c COMMAND]
+```