safe-create APP_DIR and delete contents

Author: cdleveille

.github/workflows/deploy.yml

@@ -30,7 +30,7 @@ jobs:
 
     - name: Copy files to app directory
       run: |
-        rm -rf $APP_DIR && mkdir $APP_DIR
+        mkdir -p $APP_DIR && rm -rf $APP_DIR/*
         cp main $APP_DIR/main
         cp -r $ENV_DIR/{*,.[^.]*} $APP_DIR/
         rm $APP_DIR/$LOG_FILE