diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..0d20b64
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+*.pyc
diff --git a/apps/common/apps.py b/apps/common/apps.py
new file mode 100644
index 0000000..0c3ab12
--- /dev/null
+++ b/apps/common/apps.py
@@ -0,0 +1,5 @@
+from django.apps import AppConfig
+
+class CommonConfig(AppConfig):
+    default_auto_field = 'django.db.models.BigAutoField'
+    name = 'apps.common'
\ No newline at end of file
diff --git a/apps/promociones/actions.py b/apps/promociones/actions.py
index 8f8d48e..fab8da2 100644
--- a/apps/promociones/actions.py
+++ b/apps/promociones/actions.py
@@ -1,5 +1,5 @@
 from django.db import connection
-from common.utils import clean_sql_string, clean_sql_int
+from apps.common.utils import clean_sql_string, clean_sql_int
 
 def getData(params):
     """
@@ -39,9 +39,9 @@ def setData(params):
         WHERE p.categoria_id = c.id AND p.id = %s
     """
     
-    # Fecha en formato Año-Día-Mes (Y-d-m)
+    # Fecha en formato YYYY-MM-DD para SQL
     import datetime
-    fecha_hoy = datetime.datetime.now().strftime('%Y-%d-%m')
+    fecha_hoy = datetime.datetime.now().strftime('%Y-%m-%d')
     
     parameter_dict = [
         clean_sql_string(params.get('nombre')),
diff --git a/apps/promociones/apps.py b/apps/promociones/apps.py
new file mode 100644
index 0000000..24d8bb9
--- /dev/null
+++ b/apps/promociones/apps.py
@@ -0,0 +1,5 @@
+from django.apps import AppConfig
+
+class PromocionesConfig(AppConfig):
+    default_auto_field = 'django.db.models.BigAutoField'
+    name = 'apps.promociones'
\ No newline at end of file
diff --git a/core/settings.py b/core/settings.py
index 36c1ad3..7bd15e9 100644
--- a/core/settings.py
+++ b/core/settings.py
@@ -1,20 +1,105 @@
 from dotenv import load_dotenv
 import os
+from pathlib import Path
 
 # Cargar variables desde el archivo .env
 load_dotenv()
 
-SECRET_KEY = os.getenv('SECRET_KEY')
-DEBUG = os.getenv('DEBUG') == 'True'
+# Build paths inside the project like this: BASE_DIR / 'subdir'.
+BASE_DIR = Path(__file__).resolve().parent.parent
 
-# Configuración de base de datos usando las variables
-DATABASES = {
-    'default': {
-        'ENGINE': 'django.db.backends.postgresql',
-        'NAME': os.getenv('DB_NAME'),
-        'USER': os.getenv('DB_USER'),
-        'PASSWORD': os.getenv('DB_PASSWORD'),
-        'HOST': os.getenv('DB_HOST'),
-        'PORT': os.getenv('DB_PORT'),
+SECRET_KEY = os.getenv('SECRET_KEY', 'django-insecure-change-me-for-production')
+DEBUG = os.getenv('DEBUG', 'True').lower() == 'true'
+
+ALLOWED_HOSTS = ['localhost', '127.0.0.1']
+
+INSTALLED_APPS = [
+    'django.contrib.admin',
+    'django.contrib.auth',
+    'django.contrib.contenttypes',
+    'django.contrib.sessions',
+    'django.contrib.messages',
+    'django.contrib.staticfiles',
+    'apps.promociones',
+    'apps.common',
+]
+
+MIDDLEWARE = [
+    'django.middleware.security.SecurityMiddleware',
+    'django.contrib.sessions.middleware.SessionMiddleware',
+    'django.middleware.common.CommonMiddleware',
+    'django.middleware.csrf.CsrfViewMiddleware',
+    'django.contrib.auth.middleware.AuthenticationMiddleware',
+    'django.contrib.messages.middleware.MessageMiddleware',
+    'django.middleware.clickjacking.XFrameOptionsMiddleware',
+]
+
+ROOT_URLCONF = 'core.urls'
+
+TEMPLATES = [
+    {
+        'BACKEND': 'django.template.backends.django.DjangoTemplates',
+        'DIRS': [],
+        'APP_DIRS': True,
+        'OPTIONS': {
+            'context_processors': [
+                'django.template.context_processors.debug',
+                'django.template.context_processors.request',
+                'django.contrib.auth.context_processors.auth',
+                'django.contrib.messages.context_processors.messages',
+            ],
+        },
+    },
+]
+
+WSGI_APPLICATION = 'core.wsgi.application'
+
+# Para desarrollo local: SQLite
+if DEBUG:
+    DATABASES = {
+        'default': {
+            'ENGINE': 'django.db.backends.sqlite3',
+            'NAME': BASE_DIR / 'db.sqlite3',
+        }
     }
+else:
+    # Producción: PostgreSQL desde .env
+    DATABASES = {
+        'default': {
+            'ENGINE': 'django.db.backends.postgresql',
+            'NAME': os.getenv('DB_NAME'),
+            'USER': os.getenv('DB_USER'),
+            'PASSWORD': os.getenv('DB_PASSWORD'),
+            'HOST': os.getenv('DB_HOST'),
+            'PORT': os.getenv('DB_PORT'),
+        }
+    }
+
+# Internationalization
+LANGUAGE_CODE = 'es-es'
+TIME_ZONE = 'Europe/Madrid'
+USE_I18N = True
+USE_TZ = True
+
+# Static files
+STATIC_URL = '/static/'
+STATIC_ROOT = BASE_DIR / 'staticfiles'
+
+DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'
+
+# Logging básico
+LOGGING = {
+    'version': 1,
+    'disable_existing_loggers': False,
+    'handlers': {
+        'console': {
+            'class': 'logging.StreamHandler',
+        },
+    },
+    'loggers': {
+        '': {
+            'handlers': ['console'],
+            'level': 'INFO',
+        },
+    },
 }
\ No newline at end of file
diff --git a/core/urls.py b/core/urls.py
index ddb5a6d..eaae147 100644
--- a/core/urls.py
+++ b/core/urls.py
@@ -2,5 +2,5 @@ from django.urls import path, include
 
 urlpatterns = [
     # Redirigimos todas las peticiones de /api/promociones/ a nuestra app
-    path('api/promociones/', include('promociones.urls')),
-]
\ No newline at end of file
+    path('api/promociones/', include('apps.promociones.urls')),
+]
diff --git a/db.sqlite3 b/db.sqlite3
new file mode 100644
index 0000000..933e1e8
Binary files /dev/null and b/db.sqlite3 differ
diff --git a/init_db.py b/init_db.py
new file mode 100644
index 0000000..3738b4d
--- /dev/null
+++ b/init_db.py
@@ -0,0 +1,32 @@
+import os
+os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'core.settings')
+import django
+django.setup()
+from django.db import connection
+with connection.cursor() as cursor:
+    cursor.execute("""
+    CREATE TABLE IF NOT EXISTS promociones (
+        id INTEGER PRIMARY KEY AUTOINCREMENT,
+        nombre VARCHAR(255),
+        fecha_inicio DATE,
+        descripcion TEXT,
+        activo BOOLEAN DEFAULT 1,
+        categoria_id INTEGER
+    )
+    """)
+    cursor.execute("""
+    INSERT OR IGNORE INTO promociones (id, nombre, fecha_inicio, descripcion, activo, categoria_id) 
+    VALUES (1, 'Promo Test', '2026-04-11', 'Descripcion de prueba', 1, 1)
+    """)
+    cursor.execute("""
+    CREATE TABLE IF NOT EXISTS categorias (
+        id INTEGER PRIMARY KEY AUTOINCREMENT,
+        nombre VARCHAR(255)
+    )
+    """)
+    cursor.execute("""
+    INSERT OR IGNORE INTO categorias (id, nombre) 
+    VALUES (1, 'Categoria Test')
+    """)
+connection.commit()
+print('Tablas y datos de prueba creados exitosamente en db.sqlite3')
\ No newline at end of file