Implement PostgreSQL support and update database configuration: Migrate from SQLite to PostgreSQL by updating the Prisma schema, Docker configuration, and environment variables. Add PostgreSQL dependencies and adjust the database connection logic in the application. Enhance .gitignore to exclude PostgreSQL-related files and directories.

prisma/seed.ts

@@ -3,12 +3,15 @@ import {
   EventType,
   CharacterClass,
 } from "@/prisma/generated/prisma/client";
-import { PrismaBetterSqlite3 } from "@prisma/adapter-better-sqlite3";
+import { PrismaPg } from "@prisma/adapter-pg";
+import { Pool } from "pg";
 import bcrypt from "bcryptjs";
 
-const adapter = new PrismaBetterSqlite3({
-  url: process.env.DATABASE_URL || "file:./data/dev.db",
+const pool = new Pool({
+  connectionString: process.env.DATABASE_URL,
 });
+
+const adapter = new PrismaPg(pool);
 const prisma = new PrismaClient({ adapter });
 
 async function main() {