Initial release

Signed-off-by: Marcus Noble <github@marcusnoble.co.uk>

Dockerfile

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+FROM golang:1.17-alpine AS builder
+WORKDIR /app/
+ADD go.mod go.sum ./
+RUN go mod download
+ADD . .
+RUN GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build -ldflags="-w -s" -o speedtest-exporter main.go
+
+FROM golang:1.17-alpine
+WORKDIR /app/
+COPY --from=builder /app/speedtest-exporter /app/speedtest-exporter
+ENTRYPOINT ["/app/speedtest-exporter"]