Add course_id env variable and enforce min node version

.env.example

@@ -14,3 +14,6 @@ NEXTAUTH_URL='http://localhost:3000'
 # Ably
 ABLY_SERVER_API_KEY='<ABLY_SERVER_API_KEY>'
 NEXT_PUBLIC_ABLY_CLIENT_API_KEY='<ABLY_CLIENT_API_KEY>'
+
+# Course Info
+NEXT_PUBLIC_COURSE_ID='<COURSE_ID>'

package.json

@@ -1,6 +1,7 @@
 {
   "name": "simple-office-hours-queue",
   "version": "0.1.0",
+  "engines": {"node": ">=18.17"},
   "private": true,
   "prisma": {
     "seed": "ts-node --compiler-options {\"module\":\"CommonJS\"} prisma/seed.ts"

src/utils/constants.ts

@@ -1,4 +1,4 @@
-export const COURSE_ID = "CS61B";
+export const COURSE_ID = process.env.NEXT_PUBLIC_COURSE_ID;
 
 export const EMAIL_REGEX =
   /^(([^<>()[\]\.,;:\s@\"]+(\.[^<>()[\]\.,;:\s@\"]+)*)|(\".+\"))@(([^<>()[\]\.,;:\s@\"]+\.)+[^<>()[\]\.,;:\s@\"]{2,})$/i;