much smaller docker image

Author: apetruhin

Dockerfile

@@ -1,5 +1,8 @@
 FROM golang:1.16-buster AS builder
-WORKDIR /go/src/logparser
+WORKDIR /tmp/logparser
 COPY . .
-RUN go build -mod=readonly -o /usr/bin/logparser ./cmd/
+RUN go build -mod=readonly -o ./logparser ./cmd/
+
+FROM scratch
+COPY --from=builder /tmp/logparser/logparser /usr/bin/logparser
 ENTRYPOINT ["logparser"]