🔧 웹훅 URL을 HTTPS로 수정

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

@core/scss/base/_mixins.scss

@@ -0,0 +1,63 @@
+@use "sass:map";
+@use "@styles/variables/vuetify.scss";
+
+@mixin elevation($z, $important: false) {
+  box-shadow: map.get(vuetify.$shadow-key-umbra, $z), map.get(vuetify.$shadow-key-penumbra, $z), map.get(vuetify.$shadow-key-ambient, $z) if($important, !important, null);
+}
+
+// #region before-pseudo
+// ℹ️ This mixin is inspired from vuetify for adding hover styles via before pseudo element
+@mixin before-pseudo() {
+  position: relative;
+
+  &::before {
+    position: absolute;
+    border-radius: inherit;
+    background: currentcolor;
+    block-size: 100%;
+    content: "";
+    inline-size: 100%;
+    inset: 0;
+    opacity: 0;
+    pointer-events: none;
+  }
+}
+
+// #endregion before-pseudo
+
+@mixin bordered-skin($component, $border-property: "border", $important: false) {
+  #{$component} {
+    box-shadow: none !important;
+    // stylelint-disable-next-line annotation-no-unknown
+    #{$border-property}: 1px solid rgba(var(--v-border-color), var(--v-border-opacity)) if($important, !important, null);
+  }
+}
+
+// #region selected-states
+// ℹ️ Inspired from vuetify's active-states mixin
+// focus => 0.12 & selected => 0.08
+@mixin selected-states($selector) {
+  #{$selector} {
+    opacity: calc(var(--v-selected-opacity) * var(--v-theme-overlay-multiplier));
+  }
+
+  &:hover
+  #{$selector} {
+    opacity: calc(var(--v-selected-opacity) + var(--v-hover-opacity) * var(--v-theme-overlay-multiplier));
+  }
+
+  &:focus-visible
+  #{$selector} {
+    opacity: calc(var(--v-selected-opacity) + var(--v-focus-opacity) * var(--v-theme-overlay-multiplier));
+  }
+
+  @supports not selector(:focus-visible) {
+    &:focus {
+      #{$selector} {
+        opacity: calc(var(--v-selected-opacity) + var(--v-focus-opacity) * var(--v-theme-overlay-multiplier));
+      }
+    }
+  }
+}
+
+// #endregion selected-states