Do not be root in docker and fix model caching

Change-Id: I3ad60ef259b35579902d68a0f949184d87d0067b
diff --git a/preload-models.sh b/preload-models.sh
index ad770f8..d2523e8 100755
--- a/preload-models.sh
+++ b/preload-models.sh
@@ -71,6 +71,10 @@
 "
 
 if [ -d "$TARGET_DIR/$MODEL_NAME" ]; then
+    # Set permissions so all users can read/write/execute
+    echo "Setting permissions..."
+    chmod -R a+rwX "$TARGET_DIR/$MODEL_NAME"
+
     echo ""
     echo "✓ Model $MODEL_NAME successfully preloaded to $TARGET_DIR/$MODEL_NAME"
     echo ""