URLS:

urlpatterns = [
    # ADMIN
    url(r'^admin/', admin.site.urls),
    # COCOME
    url(r'^', include('cocome_app.urls')),
] + static(settings.STATIC_URL, document_root=settings.STATIC_ROOT)

------------------------------

SETTINGS: Esta compuesto de dos ficheros common.py y production.py

--- COMMOM.PY

# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = ''

# Locale

LANGUAGES = (
    ('en', _('English')),
    ('es', _('Spanish')),
)

LOCALE_PATHS = (
    os.path.join(BASE_DIR, 'locale'),
)

# Application definition

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',

    'cocome_app',

    'compressor',
    'django_countries',
    'djmoney',
    'bootstrap4',
    'fa',
]

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    # Deben tener este orden para que funcione las traducciones
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.locale.LocaleMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
    'django.middleware.http.ConditionalGetMiddleware',
]

ROOT_URLCONF = 'cocome_project.urls'

WSGI_APPLICATION = 'cocome_project.wsgi.application'

# Password validation
# https://docs.djangoproject.com/en/1.11/ref/settings/#auth-password-validators

AUTH_PASSWORD_VALIDATORS = [
    {
        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
    },
]

# Internationalization
# https://docs.djangoproject.com/en/1.11/topics/i18n/

LANGUAGE_CODE = 'en-us'
LANGUAGE_COOKIE_NAME = 'lang'
TIME_ZONE = 'UTC'
USE_I18N = True
USE_L10N = True
USE_TZ = True

# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/1.11/howto/static-files/

STATIC_URL = '/static/'
STATIC_ROOT = os.path.join(PROJECT_PATH, 'staticfiles')
STATICFILES_DIRS = (
    os.path.join(PROJECT_PATH, 'static'),
)

# File storage
MEDIA_URL = '/media/'
MEDIA_ROOT = (
    os.path.join(BASE_DIR, 'media')
)

# Login static configuration
LOGIN_REDIRECT_URL = "/"
LOGIN_URL = '/login'
LOGOUT_URL = '/'

# Simplified static file serving.
# https://warehouse.python.org/project/whitenoise/

STATICFILES_STORAGE = 'whitenoise.django.GzipManifestStaticFilesStorage'
AUTHENTICATION_BACKENDS = ('cocome_app.backends.backend.EmailBackend',)

EMAIL_HOST = 'smtp.1and1.es'
EMAIL_PORT = 587
EMAIL_HOST_USER = ''
EMAIL_HOST_PASSWORD = ''
EMAIL_USE_TLS = True
DEFAULT_FROM_EMAIL = ''

---	PRODUCTION.PY

# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = False

ALLOWED_HOSTS = ['.dominio.es', '.dominio.com']

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [os.path.join(PROJECT_PATH, 'templates'), ],
        # 'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.i18n',
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
                'django.template.context_processors.media',
            ],
            'loaders': [
                ('django.template.loaders.cached.Loader', [
                    'django.template.loaders.filesystem.Loader',
                    'django.template.loaders.app_directories.Loader',
                ]),
            ],
        },
    },
]

COMPRESS_ENABLED = True

STATICFILES_FINDERS = (
    'django.contrib.staticfiles.finders.FileSystemFinder',
    'django.contrib.staticfiles.finders.AppDirectoriesFinder',
    # other finders..
    'compressor.finders.CompressorFinder',
)

# Database
# https://docs.djangoproject.com/en/1.11/ref/settings/#databases

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.mysql',
        'NAME': '',
        'USER': '',
        'PASSWORD': '',
        'HOST': 'mysqldb',  # Or an IP Address that your DB is hosted on
        'PORT': '3306',
    }
}


Ejemplo de template llamando a static:

{% load static %}
{% load font_awesome %}
{% load i18n %}
{% load l10n %}

<div class="col-md-9">
    <ul class="navbar-nav mr-auto flex-container">
        <li>
            <a class="nav-link" href="{% url 'cocome:login' %}">
                <img src="{% static 'img/icons/cocome-h.png' %}">
                <span>Encuentros</span>
            </a>
        </li>
        <li>
            <a class="nav-link" href="{% url 'cocome:login' %}">
                <img src="{% static 'img/icons/workshops-h.png' %}">
                <span>Talleres</span>
            </a>
        </li>
        <li>
            <a class="nav-link" href="{% url 'cocome:login' %}">
                <img src="{% static 'img/icons/chefs-h.png' %}">
                <span>Chefs</span>
            </a>
        </li>
    </ul>
</div>
<div class="col-md-3">
    <a class="btn btn-secondary btn-sm" href="{% url 'cocome:login' %}" data-turbolinks-action="replace">Iniciar sesión</a>
    <a class="btn btn-secondary btn-sm" href="{% url 'cocome:login' %}">Crear cuenta</a>
</div>