docs: Add 06-style.md

Author: devpla

docs/06-style.md

@@ -0,0 +1,23 @@
+# 06. Style
+
+- `polls/static/polls/style.css`
+```css
+li a {
+    color: green;
+}
+
+body {
+    background: white url("images/loopy.png") no-repeat;
+}
+```
+
+- `polls/templates/polls/index.html`
+```html
+{% load static %}
+
+<link rel="stylesheet" type="text/css" href="{% static 'polls/style.css' %}">
+```
+
+<br>
+
+- tailwind css를 이용한 커스텀