<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <link rel="stylesheet" href="{{ STATIC_URL }}css/common.css" type="text/css"/>
    <title>django_template</title>
</head>
<body>
{% block content %}{% endblock %}
</body>
</html>
{% spaceless %}
{% load staticfiles %}
<!DOCTYPE html>
{% endspaceless %}
<html>
<head lang="en">
    <meta charset="UTF-8">
    <link rel="stylesheet" href="{% static 'css/common.css' %}" type="text/css"/>
    <title>django_template</title>
</head>
<body>
{% block content %}{% endblock %}
</body>
</html>

Use static template tag instead of STATIC_URL variable
Use static template tag instead of STATIC_URL variable
