# Building the binary of the App
FROM golang:1.19 AS build
# `boilerplate` should be replaced with your project name
WORKDIR /go/src/boilerplate
# Copy all the Code and stuff to compile everything
COPY . .
# Downloads all the dependencies in advance (could be left out, but it's more clear this way)
RUN go mod download
# Builds the application as a staticly linked one, to allow it to run on alpine
RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -a -installsuffix cgo -o app .
# Moving the binary to the 'final Image' to make it smaller
FROM alpine:latest as release
WORKDIR /app
# Create the `public` dir and copy all the assets into it
RUN mkdir ./static
COPY ./static ./static
# `boilerplate` should be replaced here as well
COPY --from=build /go/src/boilerplate/app .
# Add packages
RUN apk -U upgrade \
&& apk add --no-cache dumb-init ca-certificates \
&& chmod +x /app/app
# Exposes port 3000 because our program listens on that port
EXPOSE 3000
ENTRYPOINT ["/usr/bin/dumb-init", "--", "sh", "-c", "/app/app"]