init: add code

prisma/schema.prisma

@@ -0,0 +1,31 @@
+// 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 = "sqlite"
+}
+
+model User {
+  id           Int     @id @default(autoincrement())
+  email        String  @unique
+  name         String  @unique
+  display_name String?
+  password     String
+  posts        Post[]
+}
+
+model Post {
+  id        Int      @id @default(autoincrement())
+  title     String
+  content   String
+  author    User     @relation(fields: [userId], references: [id])
+  userId    Int
+  replies   Post[]   @relation("PostReplies")
+  parent    Post?    @relation("PostReplies", fields: [parentId], references: [id])
+  parentId  Int?
+  createdAt DateTime @default(now())
+}