Remove Dockerfile (#467)

Use https://github.com/v2fly/docker instead.

Dockerfile

@@ -1,24 +0,0 @@
-############################
-# STEP 1 build executable binary
-############################
-FROM golang:alpine AS builder
-
-RUN apk update && apk add --no-cache git bash wget curl
-WORKDIR /build
-RUN git clone --progress https://github.com/v2fly/v2ray-core.git . && \
-    bash ./release/user-package.sh nosource noconf codename=$(git describe --abbrev=0 --tags) buildname=docker-fly abpathtgz=/tmp/v2ray.tgz
-
-############################
-# STEP 2 build a small image
-############################
-FROM alpine
-
-LABEL maintainer "V2Fly Community <admin@v2fly.org>"
-COPY --from=builder /tmp/v2ray.tgz /tmp
-RUN apk update && apk add ca-certificates && \
-    mkdir -p /usr/bin/v2ray && \
-    tar xvfz /tmp/v2ray.tgz -C /usr/bin/v2ray
-
-#ENTRYPOINT ["/usr/bin/v2ray/v2ray"]
-ENV PATH /usr/bin/v2ray:$PATH
-CMD ["v2ray", "-config=/etc/v2ray/config.json"]