dockerize

readme.md

@@ -26,6 +26,13 @@ a _really_ simple url shortener: less than 200 lines of Rust and one dependency
    urls-txt path/to/urls.txt
    ```
 
+   the default bind address is `127.0.0.0:3000`.
+   this can be changed using the environment variable `URLS_TXT_BIND_ADDRESS`.
+
+## usage (docker)
+
+a working [dockerfile](./Dockerfile) and [compose file](./compose.yaml) are provided.
+
 ## why?
 
 all url shorteners i've come across are too complicated:
@@ -56,9 +63,8 @@ pls.cx {
 ```
 location / { return 301 http://alv.cx; }
 location /urls-txt { return 301 https://git.alv.cx/alvierahman90/urls-txt; }
-
 ```
 
-##### apache
+#### apache
 
 there's probably a way ¯\_(ツ)_/¯