🔧 웹훅 URL을 HTTPS로 수정

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

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

@@ -0,0 +1,80 @@
+@use "@core/scss/base/mixins";
+@use "@configured-variables" as variables;
+@use "vuetify/lib/styles/tools/states" as vuetifyStates;
+
+%nav-header-action {
+  font-size: 1.25rem;
+}
+
+// Nav items styles (including section title)
+%vertical-nav-item {
+  margin-block: 0;
+  margin-inline: variables.$vertical-nav-horizontal-spacing;
+  padding-block: 0;
+  padding-inline: variables.$vertical-nav-horizontal-padding;
+  white-space: nowrap;
+}
+
+// This is same as `%vertical-nav-item` except section title is excluded
+%vertical-nav-item-interactive {
+  border-radius: 0.4rem;
+  block-size: 2.75rem;
+
+  /*
+    ℹ️ We will use `margin-block-end` instead of `margin-block` to give more space for shadow to appear.
+    With `margin-block`, due to small space (space gets divided between top & bottom) shadow cuts
+  */
+  margin-block-end: 0.375rem;
+}
+
+// Common styles for nav item icon styles
+// ℹ️ Nav group's children icon styles are not here (Adjusts height, width & margin)
+%vertical-nav-items-icon {
+  flex-shrink: 0;
+  font-size: variables.$vertical-nav-items-icon-size;
+  margin-inline-end: variables.$vertical-nav-items-icon-margin-inline-end;
+}
+
+// ℹ️ Icon styling for icon nested inside another nav item (2nd level)
+%vertical-nav-items-nested-icon {
+  /*
+    ℹ️ `margin-inline` will be (normal icon font-size - small icon font-size) / 2
+    (1.5rem - 0.9rem) / 2 => 0.6rem / 2 => 0.3rem
+  */
+  $vertical-nav-items-nested-icon-margin-inline: calc((variables.$vertical-nav-items-icon-size - variables.$vertical-nav-items-nested-icon-size) / 2);
+
+  font-size: variables.$vertical-nav-items-nested-icon-size;
+  margin-inline: $vertical-nav-items-nested-icon-margin-inline $vertical-nav-items-nested-icon-margin-inline + variables.$vertical-nav-items-icon-margin-inline-end;
+}
+
+%vertical-nav-items-icon-after-2nd-level {
+  visibility: hidden;
+}
+
+// Open & Active nav group styles
+%vertical-nav-group-open-active {
+  @include mixins.selected-states("&::before");
+}
+
+// Section title
+// ℹ️ Setting height will prevent jerking when text & icon is toggled
+%vertical-nav-section-title {
+  block-size: 1.5rem;
+  color: rgba(var(--v-theme-on-surface), var(--v-disabled-opacity));
+  font-size: 0.75rem;
+  text-transform: uppercase;
+}
+
+// Vertical nav item badge styles
+%vertical-nav-item-badge {
+  display: inline-block;
+  border-radius: 1.5rem;
+  font-size: 0.8em;
+  font-weight: 500;
+  line-height: 1;
+  padding-block: 0.25em;
+  padding-inline: 0.55em;
+  text-align: center;
+  vertical-align: baseline;
+  white-space: nowrap;
+}