Update

Dockerfile

 # ENV PATH /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
 # ENV HOME /
 
+RUN cat /etc/resolv.conf ; \
+    curl -I http://deb.debian.org/debian/dists/stable/InRelease ; \
+    curl -I http://security.debian.org/debian-security/dists/stable/updates/InRelease
+
 # Prepare build dependencies and clean up
 ARG BUILD_DEPS
 RUN apt-get -q update && \