Adding Dockerfile

Dockerfile

@@ -0,0 +1,27 @@
+# syntax=docker/dockerfile:1
+
+##
+## Build
+##
+FROM golang:alpine AS app-builder
+
+WORKDIR /go/src/app
+
+COPY go.mod ./
+COPY go.sum ./
+RUN go mod download
+
+COPY *.go ./
+
+RUN CGO_ENABLED=0 go install -ldflags '-extldflags "-static"' -tags timetzdata
+
+
+##
+## Deploy
+##
+FROM scratch
+COPY --from=app-builder /go/bin/mqtt2ws /mqtt2ws
+COPY --from=alpine:latest /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
+EXPOSE 1883
+ENTRYPOINT ["/mqtt2ws"]
+