feat: 初始化导航网站项目

添加 Flask 导航站应用，包含 Docker 部署配置、SQLite 数据库、静态资源及 CI/CD 流水线。

static/js/common.js

@@ -0,0 +1,27 @@
+
+// common.js
+
+// menu
+$(document).ready(function () {
+    // fix menu when passed
+    $('.masthead').visibility({
+        once: false,
+        onBottomPassed: function () {
+            $('.fixed.menu').transition('fade in');
+        },
+        onBottomPassedReverse: function () {
+            $('.fixed.menu').transition('fade out');
+        }
+    });
+    // create sidebar and attach to menu open
+    $('.ui.sidebar').sidebar('attach events', '.toc.item');
+    // avatar
+    let avatarId = $('#username').attr("data-user")
+    fetch('https://api.multiavatar.com/'
+    +JSON.stringify(avatarId))
+    .then(res => res.text())
+    .then(svg => $('#user-avatar').html(svg))
+});
+
+// masthead background
+$('.ui.inverted.masthead.segment').addClass(`bg${Math.ceil(Math.random() * 14)}`).removeClass('zoomed');