feat: click cli

main.py

@@ -1,5 +1,9 @@
 from jinja2 import Environment, FileSystemLoader, meta
+import click
 
+@click.command()
+@click.option('--output', '-o', default='output.html', help='Name of Output File')
+def main(output):
     env = Environment(loader=FileSystemLoader('.'))
     filename =  'index.html'
     # get undeclared variables
@@ -11,4 +15,8 @@ for var in vars:
         vars[var] = input(var+ ' :')
     # render template
     template = env.get_template(filename)
-print(template.render(vars))
+    with open(output,'w') as out:
+        out.write(template.render(vars))
+
+if __name__ == '__main__':
+    main()