🔧 웹훅 URL을 HTTPS로 수정

- 웹훅 URL을 https://admin.youtooplay.com/webhook로 변경
- Nginx 리버스 프록시 설정 파일 추가
- 배포 가이드 업데이트

@core/scss/template/placeholders/_vertical-nav.scss

@@ -0,0 +1,57 @@
+// Open & Active nav group styles
+%vertical-nav-group-active {
+  --v-theme-overlay-multiplier: 2;
+
+  color: rgb(var(--v-theme-primary));
+}
+
+%nav-header-action {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  background-color: rgb(var(--v-theme-primary));
+  block-size: 1.375rem;
+  inline-size: 1.375rem;
+}
+
+// nav-group and nav-link border radius
+%vertical-nav-item-interactive {
+  border-radius: 0.375rem;
+  block-size: 2.625rem;
+  margin-block-end: 0.25rem;
+}
+
+// ℹ️ Icon styling for icon nested inside another nav item (2nd level)
+%vertical-nav-items-nested-icon {
+  margin-inline: 6px 20px;
+  transition: transform 0.25s ease-in-out 0s;
+}
+
+%vertical-nav-items-icon-after-2nd-level {
+  margin-inline-start: 14px;
+  visibility: visible;
+}
+
+%vertical-nav-section-title {
+  block-size: 1.125rem;
+  color: rgba(var(--v-theme-on-surface), var(--v-disabled-opacity));
+  font-size: 0.8125rem;
+  line-height: 1.125rem;
+  text-transform: uppercase;
+}
+
+// Vertical nav item badge styles
+%vertical-nav-item-badge {
+  z-index: 1;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  border-radius: 500px;
+  block-size: 1.5rem;
+  font-size: 0.8125rem;
+  font-weight: 500;
+  line-height: 1.25rem;
+  margin-inline-end: 0.5rem;
+  padding-block: 0;
+  padding-inline: 0.625rem;
+}