doc: adding usage documentation (#100)

doc/usage/usage.md

@@ -1,2 +1,44 @@
 # Usage of time trace
 
+Currently you can run your timetrace instance using [ttrace CLI](../../cmd/main.go). 
+You can download latest version based on your OS and CPU arch [here](https://github.com/zurvan-lab/TimeTrace/releases).
+
+## checking installation
+
+You can check if you are installed ttrace properly:
+```sh
+ttrace --version
+```
+
+And:
+```sh
+ttrace --help
+```
+
+## run an instance
+
+To run an new instance you can simply make a `config.yaml` file as config first.
+
+> NOTE: see config details [here](../config/config.md).
+
+Then run your instance:
+
+```sh
+ttrace run -c {path-to-your-config.yaml}
+```
+
+## connecting with REPL
+
+You can use ttrace CLI to connect to your instance and execute TQL queries:
+
+```sh
+ttrace connect -u username -p password -a remote-address
+```
+
+## other commands
+
+Checl ttrace `--help` to find-out more commands.
+
+## other usage ways
+
+You can also implement or use a timetrace client or drive which have timetrace an TQL protocol and language implemented to run or interact with a timetrace instance.