feat: set up prisma db

prisma/schema.prisma

@@ -5,13 +5,13 @@
 // Try Prisma Accelerate: https://pris.ly/cli/accelerate-init
 
 generator client {
-  provider = "prisma-client-js"
-  output   = "../generated/prisma"
+    provider = "prisma-client-js"
+    output   = "../generated/prisma"
 }
 
 datasource db {
-  provider = "postgresql"
-  url      = env("DATABASE_URL")
+    provider = "sqlite"
+    url      = env("DATABASE_URL")
 }
 
 enum participant_status {
@@ -102,12 +102,12 @@ model Account {
     type              String
     provider          String
     providerAccountId String  @map("provider_account_id")
-    refresh_token     String? @db.Text
-    access_token      String? @db.Text
+    refresh_token     String?
+    access_token      String?
     expires_at        Int?
     token_type        String?
     scope             String?
-    id_token          String? @db.Text
+    id_token          String?
     session_state     String?
 
     user User @relation(fields: [userId], references: [id], onDelete: Cascade)