Refactor database environment variable usage across workflows and application code

- Updated Gitea workflows to standardize on `DB_NAME` instead of `DB_DATABASE` for database name references.
- Modified deployment, backup, reset, and restore workflows to ensure consistent environment variable usage.
- Removed dotenv dependency and preload script, transitioning to environment variable management directly in scripts.
- Adjusted application code to utilize `DB_NAME` for database connections and logging.
- Enhanced README to reflect changes in environment variable configuration and usage.
- Cleaned up package.json scripts to remove unnecessary preload references.

src/services/queueService.server.ts

@@ -12,7 +12,7 @@ import * as emailService from './emailService.server';
 import * as db from './db/index.db';
 import { generateFlyerIcon } from '../utils/imageProcessor';
 
-export const connection = new IORedis(process.env.REDIS_URL || 'redis://127.0.0.1:6379', {
+export const connection = new IORedis(process.env.REDIS_URL!, {
   maxRetriesPerRequest: null, // Important for BullMQ
   password: process.env.REDIS_PASSWORD, // Add the password from environment variables
 });
@@ -224,7 +224,7 @@ export const flyerWorker = new Worker<FlyerJobData>(
     // Control the number of concurrent jobs. This directly limits parallel calls to the AI API.
     // It's sourced from an environment variable for easy configuration without code changes.
     // The Google AI free tier limit is 60 RPM, so a low concurrency is safe.
-    concurrency: parseInt(process.env.WORKER_CONCURRENCY || '5', 10),
+    concurrency: parseInt(process.env.WORKER_CONCURRENCY!, 10),
   }
 );
 
@@ -307,7 +307,7 @@ export const cleanupWorker = new Worker<CleanupJobData>(
       }
 
       // 2. Determine the base path for the flyer images.
-      const storagePath = process.env.STORAGE_PATH || '/var/www/flyer-crawler.projectium.com/flyer-images';
+      const storagePath = process.env.STORAGE_PATH!;
 
       // 3. Delete the main flyer image.
       const mainImagePath = path.join(storagePath, path.basename(flyer.image_url));