Dockerfile

FROM golang:alpine AS builder

# Set necessary environmet variables needed for our image
ENV GO111MODULE=on \
  CGO_ENABLED=0 \
  GOOS=linux \
  GOARCH=amd64 \
  GOPROXY=https://goproxy.cn,direct

# Move to working directory /build
WORKDIR /build

# Copy and download dependency using go mod
COPY go.mod .
COPY go.sum .
RUN go mod download

# Copy the code into the container
COPY . .

# Build the application
RUN go build -o main .

# Move to /dist directory as the place for resulting binary folder
WORKDIR /dist

# Copy binary and config file from build to main folder
RUN cp /build/main /build/config.yml . 

# Build a small image
FROM alpine:latest

RUN echo 'http://mirrors.ustc.edu.cn/alpine/v3.5/main' > /etc/apk/repositories \
  && echo 'http://mirrors.ustc.edu.cn/alpine/v3.5/community' >>/etc/apk/repositories \
  && apk --no-cache add ca-certificates \
  && apk add tzdata \
  && cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime \
  && echo "Asia/Shanghai" > /etc/timezone \
  && apk del tzdata

WORKDIR /root

COPY --from=builder /dist/main /dist/config.yaml ./
COPY --from=builder /build/templates ./templates

VOLUME [ "/tmp" ]

# Command to run
CMD ["./main"]