fix: configure PostgreSQL for production and clean up deployment

- Fix database configuration to use PostgreSQL in production
- Add knexfile.js to support both SQLite (dev) and PostgreSQL (prod)
- Create admin user creation script (scripts/create-admin.js)
- Clean up docker-compose files:
  - Remove redundant docker-compose.yml and docker-compose.local.yml
  - Create docker-compose.dev.yml for development
  - Update docker-compose.prod.yml with proper DB configuration
- Clean up environment files:
  - Update .env.example for development
  - Update .env.production.example with proper settings
  - Remove redundant .env.local
- Update backend .env.example with database configuration options
- Create comprehensive DEPLOYMENT.md with admin setup instructions
- Fix production database name consistency (picpeak instead of photoapp)

backend/src/database/db.js

@@ -1,13 +1,7 @@
 const knex = require('knex');
-const path = require('path');
+const knexConfig = require('../../knexfile');
 
-const db = knex({
-  client: 'sqlite3',
-  connection: {
-    filename: path.join(__dirname, '../../data/photo_sharing.db')
-  },
-  useNullAsDefault: true
-});
+const db = knex(knexConfig);
 
 async function initializeDatabase() {
   // Events table
@@ -35,37 +29,42 @@ async function initializeDatabase() {
   } else {
     // Check if color_theme needs to be updated to TEXT type
     // This is needed for larger theme configurations
-    try {
-      await db.raw(`
-        CREATE TABLE IF NOT EXISTS events_new (
-          id INTEGER PRIMARY KEY AUTOINCREMENT,
-          slug TEXT UNIQUE NOT NULL,
-          event_type TEXT NOT NULL,
-          event_name TEXT NOT NULL,
-          event_date DATE NOT NULL,
-          host_email TEXT NOT NULL,
-          admin_email TEXT NOT NULL,
-          password_hash TEXT NOT NULL,
-          welcome_message TEXT,
-          color_theme TEXT,
-          share_link TEXT UNIQUE NOT NULL,
-          created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
-          expires_at DATETIME NOT NULL,
-          is_active BOOLEAN DEFAULT 1,
-          is_archived BOOLEAN DEFAULT 0,
-          archive_path TEXT,
-          archived_at DATETIME,
-          allow_user_uploads BOOLEAN DEFAULT 0,
-          upload_category_id INTEGER
-        )
-      `);
-      
-      await db.raw(`INSERT INTO events_new SELECT * FROM events`);
-      await db.raw(`DROP TABLE events`);
-      await db.raw(`ALTER TABLE events_new RENAME TO events`);
-    } catch (error) {
-      // If the migration fails, it might already have been applied
-      console.log('Color theme migration may have already been applied');
+    const isPostgres = knexConfig.client === 'pg';
+    
+    if (!isPostgres) {
+      // SQLite-specific migration
+      try {
+        await db.raw(`
+          CREATE TABLE IF NOT EXISTS events_new (
+            id INTEGER PRIMARY KEY AUTOINCREMENT,
+            slug TEXT UNIQUE NOT NULL,
+            event_type TEXT NOT NULL,
+            event_name TEXT NOT NULL,
+            event_date DATE NOT NULL,
+            host_email TEXT NOT NULL,
+            admin_email TEXT NOT NULL,
+            password_hash TEXT NOT NULL,
+            welcome_message TEXT,
+            color_theme TEXT,
+            share_link TEXT UNIQUE NOT NULL,
+            created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+            expires_at DATETIME NOT NULL,
+            is_active BOOLEAN DEFAULT 1,
+            is_archived BOOLEAN DEFAULT 0,
+            archive_path TEXT,
+            archived_at DATETIME,
+            allow_user_uploads BOOLEAN DEFAULT 0,
+            upload_category_id INTEGER
+          )
+        `);
+        
+        await db.raw(`INSERT INTO events_new SELECT * FROM events`);
+        await db.raw(`DROP TABLE events`);
+        await db.raw(`ALTER TABLE events_new RENAME TO events`);
+      } catch (error) {
+        // If the migration fails, it might already have been applied
+        console.log('Color theme migration may have already been applied');
+      }
     }
   }
 
@@ -225,4 +224,4 @@ async function logActivity(activityType, metadata = {}, eventId = null, actor =
   }
 }
 
-module.exports = { db, initializeDatabase, logActivity };
+module.exports = { db, initializeDatabase, logActivity };