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/migrations.sqlite.backup/20251216154133_add_feedback_is_read/migration.sql

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+-- RedefineTables
+PRAGMA defer_foreign_keys=ON;
+PRAGMA foreign_keys=OFF;
+CREATE TABLE "new_EventFeedback" (
+    "id" TEXT NOT NULL PRIMARY KEY,
+    "userId" TEXT NOT NULL,
+    "eventId" TEXT NOT NULL,
+    "rating" INTEGER NOT NULL,
+    "comment" TEXT,
+    "isRead" BOOLEAN NOT NULL DEFAULT false,
+    "createdAt" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" DATETIME NOT NULL,
+    CONSTRAINT "EventFeedback_eventId_fkey" FOREIGN KEY ("eventId") REFERENCES "Event" ("id") ON DELETE CASCADE ON UPDATE CASCADE,
+    CONSTRAINT "EventFeedback_userId_fkey" FOREIGN KEY ("userId") REFERENCES "User" ("id") ON DELETE CASCADE ON UPDATE CASCADE
+);
+INSERT INTO "new_EventFeedback" ("comment", "createdAt", "eventId", "id", "rating", "updatedAt", "userId") SELECT "comment", "createdAt", "eventId", "id", "rating", "updatedAt", "userId" FROM "EventFeedback";
+DROP TABLE "EventFeedback";
+ALTER TABLE "new_EventFeedback" RENAME TO "EventFeedback";
+CREATE INDEX "EventFeedback_userId_idx" ON "EventFeedback"("userId");
+CREATE INDEX "EventFeedback_eventId_idx" ON "EventFeedback"("eventId");
+CREATE INDEX "EventFeedback_isRead_idx" ON "EventFeedback"("isRead");
+CREATE UNIQUE INDEX "EventFeedback_userId_eventId_key" ON "EventFeedback"("userId", "eventId");
+PRAGMA foreign_keys=ON;
+PRAGMA defer_foreign_keys=OFF;