tmpl.Dockerfile

# syntax=docker/dockerfile:1.0-experimental

############################
# STEP 1 build executable binary
############################
FROM golang:1.13-alpine as builder

# Install git + SSL ca certificates.
# Git is required for fetching the dependencies.
# Ca-certificates is required to call HTTPS endpoints.
RUN apk update && apk add --no-cache git ca-certificates tzdata alpine-sdk && update-ca-certificates

# Create appuser
RUN adduser -D -g '' appuser

WORKDIR /build

# cache modules
COPY go.mod .
COPY go.sum .
RUN go mod download

COPY . .
RUN make install
RUN GOARCH={{ .GoARCH }} GOARM={{ .GoARM }} make build

#############################
## STEP 2 build a small image
#############################
FROM {{ .RuntimeImage }}

# Import from builder.
COPY --from=builder /usr/share/zoneinfo /usr/share/zoneinfo
COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
COPY --from=builder /etc/passwd /etc/passwd

# Copy our static executable.
COPY --from=builder /build/mbmd /usr/local/bin/mbmd

# Use an unprivileged user.
USER appuser

EXPOSE 8080

# Run the binary
ENTRYPOINT ["/usr/local/bin/mbmd"]