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Dockerfile
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Dockerfile
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# TODO: Dockerfile for prod
# Start from the latest golang base image
FROM golang:1.13-alpine as builder
# Add Maintainer Info
LABEL maintainer="Joseph Gill <joseph.gill.atlanta@gmail.com>"
# update
RUN apk --update upgrade
# Set the Current Working Directory inside the container
WORKDIR /app
# Copy go mod and sum files
COPY go.mod ./
COPY go.sum ./
# Download all dependencies. Dependencies will be cached if the go.mod and go.sum files are not changed
RUN go mod download
# Copy the source from the current directory to the Working Directory inside the container
COPY . .
# Build the Go app
RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o main .
######## Start a new stage from scratch #######
FROM alpine:latest as final
# DEV ONLY #
# add bash et al
RUN apk add --no-cache bash coreutils grep sed curl
WORKDIR /root/
# Copy the Pre-built binary file from the previous stage
COPY --from=builder /app/main .
# Create an unprivileged user (order of operations matters)
RUN adduser --disabled-password --gecos '' appuser
# Do not forget to chmod so no permission errors
RUN chmod 755 .
# Use the unpriveleged user
USER appuser
# Expose port 8080 to the outside world
# EXPOSE 8080
# Command to run the executable
# CMD ["./main"]
ENTRYPOINT ./main