Build go binary in Docker

edgard#9

.dockerignore

@@ -0,0 +1,6 @@
+.*
+Dockerfile
+LICENSE*
+NOTICE*
+README*
+iperf3_windows.go

Dockerfile

@@ -1,8 +1,18 @@
+FROM golang:alpine AS build-env
+
+# Download dependencies
+WORKDIR /go/src
+COPY go.mod go.sum ./
+RUN go mod download
+
+# Build current sources
+COPY . .
+RUN go build -o /go/bin/iperf3_exporter
+
+# Prepare runtime environment
 FROM alpine:latest
 LABEL maintainer="Edgard Castro <[email protected]>"
-
+EXPOSE 9579
 RUN apk add --no-cache iperf3
-COPY iperf3_exporter /bin/iperf3_exporter
-
-ENTRYPOINT ["/bin/iperf3_exporter"]
-EXPOSE     9579
+COPY --from=build-env /go/bin/iperf3_exporter /bin/
+ENTRYPOINT ["/bin/iperf3_exporter"]