Fixed ca certificates as directory

docker/Dockerfile

@@ -1,6 +1,6 @@
 FROM scratch
 COPY DIST/ /app
-COPY docker/ca-certificates.crt /etc/ssl/certs
+COPY docker/ca-certificates.crt /etc/ssl/certs/
 WORKDIR /app
 EXPOSE 2015
 CMD ["/app/demo1"]