docker: strip binary

Author: narqo

Dockerfile

@@ -2,7 +2,7 @@ FROM golang:1.15-alpine as builder
 RUN apk add --update --no-cache build-base ca-certificates
 WORKDIR /go/src/github-weather
 COPY . /go/src/github-weather
-RUN CGO_ENABLED=0 go build -a -ldflags '-extldflags "-static"' -o bin/github-weather .
+RUN CGO_ENABLED=0 go build -a -ldflags '-s -w -extldflags "-static"' -o bin/github-weather .
 
 FROM scratch
 COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt