Create output file

src/ergogen_footprint_converter/main.py

@@ -26,7 +26,7 @@ def convert(in_file: Path) -> str:
 def write_output (output: str, in_file: Path, out_dir: Path) -> None:
     filename = in_file.name.split('.')[0] + ".js"
 
-    with open(filename, 'w') as file:
+    with open(out_dir / filename, 'w') as file:
         file.writelines(output)
 
 def check_args(args) -> None: