Add Docker Support

Dockerfile

@@ -0,0 +1,19 @@
+FROM golang:alpine AS builder
+
+WORKDIR /root
+
+RUN apk update && apk add git \
+    && git clone https://github.com/iyear/E5SubBot.git \
+    && cd E5SubBot && go build
+
+FROM alpine:latest
+
+ENV TIME_ZONE=Asia/Shanghai
+
+RUN ln -snf /usr/share/zoneinfo/$TIME_ZONE /etc/localtime && echo $TIME_ZONE > /etc/timezone
+
+WORKDIR /root
+
+COPY --from=builder /root/E5SubBot/main /root
+
+CMD [ "/root/main" ]