Update README.md

README.md

@@ -1,3 +1,32 @@
 # tg_bots_scripts
 
-Scripts for telegram bot for (re)start/stop without pain.
+Scripts for telegram bot for (re)start/stop without pain.
+
+## Usage
+1. Put service.py in yours project.
+2. Set name of main script - `main.py`
+3. Use the `service.py` so:
+```
+Usage: python service.py <option>
+
+Options:
+    status  - Get status of main script.
+    start   - Start main script.
+    stop    - Stop main script.
+    restart - Restart main script.
+```
+
+## EXIT CODES MEANING
+* status
+  * 0 - running
+  * 1 - stopped
+* start
+  * 0 - started
+  * 1 - can't start
+  * 2 - already running
+* stop
+  * 0 - stopped
+  * 2 - already stopped
+* restart
+  * 0 - restarted
+  * 1 - can't start