config: switch to SQLite database and change application port to 8080

- Replace PostgreSQL with SQLite as default database backend
- Comment out PostgreSQL configuration for potential future use
- Update Docker exposed port from 8000 to 8080
- Update Gunicorn bind address to match new port

This simplifies the deployment setup by removing the PostgreSQL
dependency and aligns the application port with common alternatives
to port 8000.

booking_system/settings.py

@@ -72,24 +72,24 @@ TEMPLATES = [
 WSGI_APPLICATION = 'booking_system.wsgi.application'
 
 
-# DATABASES = {
-#     'default': {
-#         'ENGINE': 'django.db.backends.sqlite3',
-#         'NAME': BASE_DIR / 'db.sqlite3',
-#     }
-# }
-
 DATABASES = {
     'default': {
-        'ENGINE': 'django.db.backends.postgresql',
+        'ENGINE': 'django.db.backends.sqlite3',
-        'NAME': os.getenv('POSTGRES_DB'),
+        'NAME': BASE_DIR / 'db.sqlite3',
-        'USER': os.getenv('POSTGRES_USER'),
-        'PASSWORD': os.getenv('POSTGRES_PASSWORD'),
-        'HOST': os.getenv('POSTGRES_HOST', 'postgres'),
-        'PORT': os.getenv('POSTGRES_PORT', 5432),
     }
 }
 
+# DATABASES = {
+#     'default': {
+#         'ENGINE': 'django.db.backends.postgresql',
+#         'NAME': os.getenv('POSTGRES_DB'),
+#         'USER': os.getenv('POSTGRES_USER'),
+#         'PASSWORD': os.getenv('POSTGRES_PASSWORD'),
+#         'HOST': os.getenv('POSTGRES_HOST', 'postgres'),
+#         'PORT': os.getenv('POSTGRES_PORT', 5432),
+#     }
+# }
+
 ENCRYPTION_KEY = os.getenv('ENCRYPTION_KEY')
 
 

dockerfile

@@ -24,7 +24,7 @@ COPY . .
 RUN python manage.py collectstatic --noinput
 
 # Expose port
-EXPOSE 8000
+EXPOSE 8080
 
 # Run migrations and start Gunicorn
-CMD sh -c "python manage.py migrate && gunicorn booking_system.wsgi:application --bind 0.0.0.0:8000 --workers 3"
+CMD sh -c "python manage.py migrate && gunicorn booking_system.wsgi:application --bind 0.0.0.0:8080 --workers 3"