Add a dockerfile (#257)

Author: MrARM

Dockerfile

@@ -0,0 +1,11 @@
+FROM alpine:latest
+
+RUN apk add --no-cache python3 openjdk11 sed git
+
+WORKDIR /app
+ADD . .
+
+RUN sh build.sh
+
+ENTRYPOINT ["python3", "serve.py"]
+EXPOSE 8000