chore: add schema for prisma

prisma/schema.prisma

@@ -0,0 +1,67 @@
+// This is your Prisma schema file,
+// learn more about it in the docs: https://pris.ly/d/prisma-schema
+
+generator client {
+  provider = "prisma-client-js"
+}
+
+datasource db {
+  provider = "mongodb"
+  url      = env("DATABASE_URL")
+}
+
+model User {
+  id        String   @id @default(auto()) @map("_id") @db.ObjectId
+  email     String?   @unique
+  name      String?
+  username  String?   @unique
+  bio       String?
+  emailVerified DateTime?
+  image     String?
+  coverImage String?
+  profileImage String?
+  hashedPassword String?
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+  followingIds String[] @db.ObjectId
+  hasNotification Boolean?
+
+  posts     Post[]
+  comments  Comment[]
+  notifications Notification[]
+} 
+
+model Post {
+  id        String   @id @default(auto()) @map("_id") @db.ObjectId
+  body      String
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+  userId   String   @db.ObjectId
+  likedIds String[] @db.ObjectId
+
+  user User @relation(fields: [userId], references: [id], onDelete: Cascade)
+
+  comments Comment[]
+}
+
+model Comment {
+  id        String   @id @default(auto()) @map("_id") @db.ObjectId
+  body      String
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+  userId   String   @db.ObjectId
+  postId   String   @db.ObjectId
+
+  user User @relation(fields: [userId], references: [id], onDelete: Cascade)
+  post Post @relation(fields: [postId], references: [id], onDelete: Cascade)
+}
+
+model Notification {
+  id        String   @id @default(auto()) @map("_id") @db.ObjectId
+  body      String
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+  userId   String   @db.ObjectId
+
+  user User @relation(fields: [userId], references: [id], onDelete: Cascade)
+}