✨ refactor: update environment variable usage and add caching

package-lock.json

@@ -15,6 +15,7 @@
         "dotenv": "^16.4.7",
         "gray-matter": "^4.0.3",
         "next": "15.1.7",
+        "node-cache": "^5.1.2",
         "node-fetch": "^3.3.2",
         "nodemailer": "^6.10.0",
         "react": "^19.0.0",
@@ -3631,6 +3632,15 @@
         "node": ">=12"
       }
     },
+    "node_modules/clone": {
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/clone/-/clone-2.1.2.tgz",
+      "integrity": "sha512-3Pe/CF1Nn94hyhIYpjtiLhdCoEoz0DqQ+988E9gmeEdQZlojxnOb74wctFyuwWQHzqyf9X7C7MG8juUpqBJT8w==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=0.8"
+      }
+    },
     "node_modules/co": {
       "version": "4.6.0",
       "resolved": "https://registry.npmjs.org/co/-/co-4.6.0.tgz",
@@ -8039,6 +8049,18 @@
         "node": "^10 || ^12 || >=14"
       }
     },
+    "node_modules/node-cache": {
+      "version": "5.1.2",
+      "resolved": "https://registry.npmjs.org/node-cache/-/node-cache-5.1.2.tgz",
+      "integrity": "sha512-t1QzWwnk4sjLWaQAS8CHgOJ+RAfmHpxFWmc36IWTiWHQfs0w5JDMBS1b1ZxQteo0vVVuWJvIUKHDkkeK7vIGCg==",
+      "license": "MIT",
+      "dependencies": {
+        "clone": "2.x"
+      },
+      "engines": {
+        "node": ">= 8.0.0"
+      }
+    },
     "node_modules/node-domexception": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/node-domexception/-/node-domexception-1.0.0.tgz",