Issue with docker_build.py

[Vishal]

Hello,
I'm trying to set up the docker image on ubuntu 16.04 by following the Getting Started Tutorial. When I run the ./docker_build.py i get following error which I can't decipher. Can you please help me into this?

terminal extract:

` mhv7rng@RNGX4031:$ cd pytorch-dense-correspondence mhv7rng@RNGX4031:/pytorch-dense-correspondence$ cd docker
mhv7rng@RNGX4031:~/pytorch-dense-correspondence/docker$ ./docker_build.py
building docker container . . .
building docker image named mhv7rng-pytorch-dense-correspondence
command =

docker build --build-arg USER_NAME=mhv7rng --build-arg USER_PASSWORD=password --build-arg USER_ID=1584004904 --build-arg USER_GID=1584004904 -t mhv7rng-pytorch-dense-correspondence -f pytorch-dense-correspondence.dockerfile .

executing shell command
Sending build context to Docker daemon 17.92kB
Step 1/28 : FROM nvidia/cuda:8.0-devel-ubuntu16.04
---> dab5c9f3cbed
Step 2/28 : ARG USER_NAME
---> Using cache
---> ad58747699b3
Step 3/28 : ARG USER_PASSWORD
---> Using cache
---> 53aab4793e52
Step 4/28 : ARG USER_ID
---> Using cache
---> d064dce876f6
Step 5/28 : ARG USER_GID
---> Using cache
---> 5bf2c030173b
Step 6/28 : RUN apt-get update
---> Using cache
---> 0f5831f1ab83
Step 7/28 : RUN apt install sudo
---> Running in 1d83d24d096b

WARNING: apt does not have a stable CLI interface. Use with caution in scripts.

Reading package lists...
Building dependency tree...
Reading state information...
E: Unable to locate package sudo
The command '/bin/sh -c apt install sudo' returned a non-zero code: 100

`

[Lucas Manuelli]

Hi,

I just tried a clean build of the docker image and wasn't able to reproduce your issue on my machine. It looks like the apt install sudo command is failing inside the docker image for some reason. A PR #199 was just merged so you might try with a clean build from that point.