cannot find fairseq image when creating container

I am using fairseq_sagemaker_translate_en2fr notebook for training. When I am building a container for fairseq using command:
```
%%sh
chmod +x create_container.sh

./create_container.sh pytorch-fairseq
```
getting:

```
Getting from region us-east-1 and account 198247849549
Sending build context to Docker daemon 16.84MB
Step 1/16 : FROM nvidia/cuda:9.0-cudnn7-devel-ubuntu16.04
The push refers to repository [198247849549.dkr.ecr.us-east-1.amazonaws.com/pytorch-fairseq]
WARNING! Using --password via the CLI is insecure. Use --password-stdin.
Error response from daemon: Get https://198247849549.dkr.ecr.us-east-1.amazonaws.com/v2/: dial tcp: lookup 198247849549.dkr.ecr.us-east-1.amazonaws.com on [::1]:53: read udp [::1]:51282->[::1]:53: read: connection refused
WARNING! Using --password via the CLI is insecure. Use --password-stdin.
Error response from daemon: Get https://520713654638.dkr.ecr.us-east-1.amazonaws.com/v2/: dial tcp: lookup 520713654638.dkr.ecr.us-east-1.amazonaws.com on [::1]:53: read udp [::1]:58091->[::1]:53: read: connection refused
Get https://registry-1.docker.io/v2/: dial tcp: lookup registry-1.docker.io on [::1]:53: read udp [::1]:55097->[::1]:53: read: connection refused
Error response from daemon: No such image: pytorch-fairseq:latest
An image does not exist locally with the tag: 198247849549.dkr.ecr.us-east-1.amazonaws.com/pytorch-fairseq

---------------------------------------------------------------------------
CalledProcessError Traceback (most recent call last)
in
----> 1 get_ipython().run_cell_magic('sh', '', 'chmod +x create_container.sh \n\n./create_container.sh pytorch-fairseq\n')
~/anaconda2/envs/xyz/sagemaker/lib/python3.7/site-packages/IPython/core/interactiveshell.py in run_cell_magic(self, magic_name, line, cell)
2380 with self.builtin_trap:
2381 args = (magic_arg_s, cell)
-> 2382 result = fn(*args, **kwargs)
2383 return result
2384
~/anaconda2/envs/xyz/sagemaker/lib/python3.7/site-packages/IPython/core/magics/script.py in named_script_magic(line, cell)
140 else:
141 line = script
--> 142 return self.shebang(line, cell)
143
144 # write a basic docstring:
in shebang(self, line, cell)
~/anaconda2/envs/xyz/sagemaker/lib/python3.7/site-packages/IPython/core/magic.py in (f, *a, **k)
185 # but it's overkill for just that one bit of state.
186 def magic_deco(arg):
--> 187 call = lambda f, *a, **k: f(*a, **k)
188
189 if callable(arg):
~/anaconda2/envs/xyz/sagemaker/lib/python3.7/site-packages/IPython/core/magics/script.py in shebang(self, line, cell)
243 sys.stderr.flush()
244 if args.raise_error and p.returncode!=0:
--> 245 raise CalledProcessError(p.returncode, cell, output=out, stderr=err)
246
247 def _run_script(self, p, cell, to_close):
CalledProcessError: Command 'b'chmod +x create_container.sh \n\n./create_container.sh pytorch-fairseq\n'' returned non-zero exit status 1.
```
Looks like it cannot find fairseq image. Any help here?

Start with the fairseq_sagemaker_translate_en2fr notebook and create_container.sh, then inspect the Docker and ECR steps around the failed image lookup. Re-run the shown command while checking connectivity to the reported ECR and Docker registry endpoints. Done means the pytorch-fairseq image is built or found locally and the script completes its tagging and push steps.

Written by the indexing model from the issue text.