Change entrypoint to always download model

entrypoint.sh

 #!/bin/sh
-# Script downloads models defined in config file and starts worker. 
+# Script downloads models defined in config file and starts worker.
 # Script should be called inside a container.
 
 config_file='/home/worker/config.ini'
 
 # for now, name of file won't be changed so it's ok to use hardcoded value
-model_filename='merged_graph.xml.gz'  
+model_filename='merged_graph.xml.gz'
 
 # Simple function to retireve value for given key from ini file.
 # Note that key should be unique, it does not handle sections
@@ -33,12 +33,15 @@ cd "$model_dir"
 model_dir=$(get_ini_value "$config_file" "model_dir")
 model_url=$(get_ini_value "$config_file" "model_url")
 
-if [ ! -f "$model_filename" ]; then
-    echo "Downloading a model '$model_filename' from '$model_url' ..."
-    remote_model_name="$model_filename"'.zip'  # assuming it is a zip archive
-    wget -O "$remote_model_name" "$model_url"
-    unzip "$remote_model_name"; rm "$remote_model_name"
-    echo "Done!"
+if [ -f "$model_filename" ]; then
+    echo "Removing old model ..."
+    rm -f "$model_filename"
 fi
+echo "Downloading a model '$model_filename' from '$model_url' ..."
+remote_model_name="$model_filename"'.zip'  # assuming it is a zip archive
+wget -O "$remote_model_name" "$model_url"
+unzip "$remote_model_name"; rm "$remote_model_name"
+echo "Done!"
+
 
 cd /home/worker && python3.6 main.py