added Dockerfile (closes #27)

Dockerfile

@@ -0,0 +1,3 @@
+FROM alpine:3.11.5
+RUN apk add --no-cache nodejs npm git imagemagick make && git clone https://gitdab.com/Codinget/Snek /snek && cd /snek && npm i && make && apk del git make imagemagick && printf '#!/bin/sh\ncd /snek\nnpm start\n' > start.sh && chmod +x start.sh
+CMD /snek/start.sh

README.md

@@ -16,9 +16,7 @@ A "simple" Snake, done as my final JS class project
 	- Node.js 10 and 12 are known to work
 
 ## Running the game
-- Clone this repository
-- Install the npm dependencies (`npm install`)
-- Generate the assets, stylesheets and scripts (`make`)
-- Start the webserver (`npm start`)
-- The server listens on port 3000 on all available addresses
-
+- Get the Dockerfile
+- `docker build` it
+- `docker run -p80:3000 <whatever you called the container>`
+- ideally, put it behind a reverse proxy