Update PyTorch container, fix data download

Dockerfile

@@ -1,4 +1,4 @@
-FROM nvcr.io/nvidia/pytorch:21.06-py3
+FROM nvcr.io/nvidia/pytorch:22.01-py3
 
 RUN rm -rf /workspace/*
 WORKDIR /workspace/unet

scripts/download_data.sh

@@ -1,12 +1,18 @@
-echo -n "Kaggle username: "
-read USERNAME
-echo ""
-echo -n "Kaggle API key: "
-read APIKEY
+#!/bin/bash
+
+if [[ ! -f ~/.kaggle/kaggle.json ]]; then
+  echo -n "Kaggle username: "
+  read USERNAME
+  echo
+  echo -n "Kaggle API key: "
+  read APIKEY
+
+  mkdir -p ~/.kaggle
+  echo "{\"username\":\"$USERNAME\",\"key\":\"$APIKEY\"}" > ~/.kaggle/kaggle.json
+  chmod 600 ~/.kaggle/kaggle.json
+fi
 
 pip install kaggle --upgrade
-mkdir -p ~/.kaggle
-echo "{\"username\":\"$USERNAME\",\"key\":\"$APIKEY\"}" > ~/.kaggle/kaggle.json
 
 kaggle competitions download -c carvana-image-masking-challenge -f train_hq.zip
 unzip train_hq.zip
@@ -18,4 +24,4 @@ kaggle competitions download -c carvana-image-masking-challenge -f train_masks.z
 unzip train_masks.zip
 mv train_masks/* data/masks/
 rm -d train_masks
-rm train_masks.zip
+rm train_masks.zip