Added Dockerfile (#5)

Dockerfile

@@ -0,0 +1,12 @@
+# build stage
+FROM golang:1.12.6-stretch AS build-env
+ADD . /src
+ENV CGO_ENABLED=0
+WORKDIR /src
+RUN go build -o dnsmasq_exporter
+
+# final stage
+FROM scratch
+WORKDIR /app
+COPY --from=build-env /src/dnsmasq_exporter /app/
+ENTRYPOINT ["/app/dnsmasq_exporter"]

README.md

@@ -31,6 +31,12 @@ systemctl daemon-reload
 systemctl enable --now dnsmasq_exporter
 ```
 
+### Alternative usage
+```shell
+docker build -t dnsmasq_exporter .
+docker run --restart=unless-stopped --net=host dnsmasq_exporter
+```
+
 Then, add the endpoint to your Prometheus configuration file:
 
 ```yaml

go.mod

@@ -0,0 +1,10 @@
+module github.com/google/dnsmasq_exporter
+
+go 1.12
+
+require (
+	github.com/miekg/dns v1.1.14
+	github.com/prometheus/client_golang v0.9.4
+	github.com/prometheus/common v0.4.1
+	golang.org/x/sync v0.0.0-20190423024810-112230192c58
+)