fancy multi stage builder pattern

Dockerfile

@@ -1,7 +1,15 @@
 FROM golang:alpine AS builder
 RUN apk --update add ca-certificates git make bash
+
 WORKDIR /app
 COPY . ./
+
 RUN go mod tidy
 RUN make bot
-ENTRYPOINT ["bin/bot"]
+
+FROM alpine
+RUN apk --no-cache add ca-certificates
+
+COPY --from=builder /app/bin/bot /bot
+
+ENTRYPOINT ["/bot"]