Dockerfile

ARG APP_VERSION=0.0.0-SNAPSHOT
ARG APP_GID=5000
ARG APP_UID=5000

## Build stage
FROM golang:1.16-alpine AS build
ENV CGO_ENABLED=0
WORKDIR /app

# Download deps
COPY go.mod ./
COPY go.sum ./
RUN go mod download

# Build app
ARG APP_VERSION
COPY cmd cmd
COPY util util
RUN go build -v \
-ldflags="-X 'main.appVersion=${APP_VERSION}'" \
-o prometheus-ethermine-exporter \
cmd/prometheus-ethermine-exporter/*.go

# Test
#RUN go test -v .

## Runtime stage
FROM alpine:3 AS runtime
WORKDIR /app

ARG APP_GID
ARG APP_UID
RUN addgroup -g $APP_GID -S app && adduser -G app -u $APP_UID -S app

COPY --from=build /app/prometheus-ethermine-exporter ./
RUN chown app:app prometheus-ethermine-exporter

USER app
ENTRYPOINT ["./prometheus-ethermine-exporter"]
CMD [""]