fix isprime

isprime-go/Dockerfile

@@ -29,7 +29,7 @@ FROM alpine:3
 RUN apk add --no-cache ca-certificates
 
 # Copy the binary to the production image from the builder stage.
-COPY --from=builder /app/server /server
+COPY --from=builder /go/src/app/server /server
 
 # Run the web service on container startup.
 CMD ["/server"]