* add docker config with a nginx

* add a make script for easy startup
* extend the readme to subscribe, how you can run with docker

Dockerfile

@@ -0,0 +1,7 @@
+# syntax = docker/dockerfile:1.2
+FROM nginx:1.21-alpine as prod
+
+EXPOSE 4242
+COPY . /usr/share/nginx/html/
+COPY app.conf /etc/nginx/nginx.conf
+