Merge pull request #158 from gogeof/master

fix docker run failed without PORT environment setting problem.

Author: hugolgst

Diff for: README.md

@@ -92,7 +92,7 @@ $ docker pull docker.pkg.github.com/olivia-ai/olivia/olivia:latest
 
 Then start it
 ```bash
-$ docker run -d -p 8080:8080 docker.pkg.github.com/olivia-ai/olivia/olivia:latest
+$ docker run -d -e PORT=8080 -p 8080:8080 docker.pkg.github.com/olivia-ai/olivia/olivia:latest
 ```
 
 You can just use the websocket of Olivia now.