upd readme

README.md

@@ -8,17 +8,36 @@ Unfortunately the Q3Rcon engine ties the rcon port to the game servers public po
 
 ### Use
 
-Run one or multiple rcon proxies by setting an environment variable `Q3RCON_TARGET_PORTS`
-
-for example:
+#### Flags
 
 ```bash
+#!/usr/bin/env bash
+
+/usr/local/bin/q3rcon-proxy \
+    --proxy-host=0.0.0.0 \
+    --target-host=localhost \
+    --ports-mapping=28961:28960 \
+    --session-timeout=20 \
+    --loglevel=debug
+```
+
+#### Environment Variables
+
+Each of the flags has a corresponding environment variable:
+
+-   `Q3RCON_PROXY_HOST`: The host the proxy server sits on.
+-   `Q3RCON_TARGET_HOST`: The host the game servers sit on.
+-   `Q3RCON_PORTS_MAPPING`: A mapping as a with `source:target` pairs delimited by `;`.
+-   `Q3RCON_SESSION_TIMEOUT`: Timeout in seconds for each udp session.
+-   `Q3RCON_LOGLEVEL`: The application's logging level (see [Logging][logging]).
+
+Multiple rcon proxies may be configured by setting *--ports-mapping/Q3RCON_PORTS_MAPPING* like so:
+
+```console
 export Q3RCON_TARGET_PORTS="20000:28960;20001:28961;20002:28962"
 ```
 
-This would configure q3rcon-proxy to run 3 proxy servers listening on ports `20000`, `20001` and `20002` that redirect rcon requests to game servers on ports `28960`, `28961` and `28962` respectively.
-
-Then just run the binary which you can compile yourself, download from `Releases` or use the included Dockerfile.
+This would configure q3rcon-proxy to run 3 proxy servers listening on ports 20000, 20001 and 20002 that redirect rcon requests to game servers on ports 28960, 28961 and 28962 respectively.
 
 ### Logging
 
@@ -48,3 +67,4 @@ If not set it will default to `info`.
 For a compatible rcon client also written in Go consider checking out the [Q3 Rcon][q3rcon] package.
 
 [q3rcon]: https://github.com/onyx-and-iris/q3rcon
+[logging]: https://github.com/onyx-and-iris/gignore?tab=readme-ov-file#logging