feat: add http server

Dockerfile

@@ -0,0 +1,20 @@
+FROM golang:alpine as build
+
+WORKDIR /go/src
+
+ADD . .
+
+RUN sed -i 's/dl-cdn.alpinelinux.org/mirrors.ustc.edu.cn/g' /etc/apk/repositories \
+    && apk --no-cache add ca-certificates \
+    && go env -w GOPROXY='https://goproxy.cn,direct' \
+    && go mod tidy \
+    && go build -o /go/bin/app .
+
+FROM scratch
+# copy the ca-certificate.crt from the build stage
+COPY --from=build /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
+COPY --from=build /go/bin/app /app
+
+EXPOSE 80
+
+ENTRYPOINT ["/app"]