add docker support

Dockerfile

@@ -0,0 +1,5 @@
+FROM chromedp/headless-shell
+ADD wrp-linux /wrp
+ENTRYPOINT ["/wrp"]
+ENV PATH="/headless-shell:${PATH}"
+LABEL maintainer="as@tenoware.com"

Makefile

@@ -23,3 +23,6 @@ windows:
 
 clean:
 	rm -rf wrp-linux wrp-freebsd wrp-openbsd wrp-macos wrp-windows.exe wrp-linux-rpi
+
+docker:
+	docker build -t tenox7/wrp:latest .

README.md

@@ -22,12 +22,21 @@ A HTTP proxy server that allows to use historical and obsolete web browsers on t
 7. To send keystrokes fill K input box and press Go. There also are buttons for backspace, enter and arrow keys.
 
 ## Flags
+
 ```
 -l  listen address:port, default :8080
 -h  headed mode, display browser window
 -d  chromedp debug logging
 ```
 
+## Docker
+
+```
+docker run -d -p 8080:8080 --name wrp --restart unless-stopped tenox7/wrp
+
+docker logs -f wrp
+```
+
 ## Minimal Requirements
 
 - Server / Gateway should run on a modern hardware/os that supports memory hungry Chrome.