diff --git a/blog/blog/settings.py b/blog/blog/settings.py
index eb1af4a..945a639 100644
--- a/blog/blog/settings.py
+++ b/blog/blog/settings.py
@@ -12,21 +12,165 @@ https://docs.djangoproject.com/en/4.0/ref/settings/
 
 from pathlib import Path
 import os
+import environ
 
-# Build paths inside the project like this: BASE_DIR / 'subdir'.
 BASE_DIR = Path(__file__).resolve().parent.parent
+
+environ.Env.read_env(os.path.join(BASE_DIR, ".env"))
+env = environ.Env(
+    # set casting, default value
+    DEBUG=(bool, False),
+    DEVELOPMENT_MODE=(bool, False),
+)
+
+# Build paths inside the project like this: BASE_DIR / 'subdir'.
+
+PROJECT_ROOT = os.path.dirname(__file__)
+
+# Quick-start development settings - unsuitable for production
+# See https://docs.djangoproject.com/en/4.0/howto/deployment/checklist/
+
+# SECURITY WARNING: keep the secret key used in production secret!
+SECRET_KEY = env("SECRET_KEY")
+
+# SECURITY WARNING: don't run with debug turned on in production!
+DEBUG = env("DEBUG")
+DEVELOPMENT_MODE = env("DEVELOPMENT_MODE")
+ALLOWED_HOSTS = ["127.0.0.1"]
+
+
+# Application definition
+
+INSTALLED_APPS = [
+    "django.contrib.admin",
+    "django.contrib.auth",
+    "django.contrib.contenttypes",
+    "django.contrib.sessions",
+    "django.contrib.messages",
+    "django.contrib.staticfiles",
+    "posts.apps.PostConfig",
+    "mainpage.apps.MainpageConfig",
+    "comments.apps.CommentsConfig",
+]
+
+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 = "blog.urls"
+
+TEMPLATES = [
+    {
+        "BACKEND": "django.template.backends.django.DjangoTemplates",
+        "DIRS": [os.path.join(BASE_DIR, "templates")],
+        "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 = "blog.wsgi.application"
+
+
+# Database
+# https://docs.djangoproject.com/en/4.0/ref/settings/#databases
+
+if DEVELOPMENT_MODE=(bool, False),
+)
+
+# Build paths inside the project like this: BASE_DIR / 'subdir'.
+
 PROJECT_ROOT = os.path.dirname(__file__)
 
 # Quick-start development settings - unsuitable for production
 # See https://docs.djangoproject.com/en/4.0/howto/deployment/checklist/
 
 # SECURITY WARNING: keep the secret key used in production secret!
-SECRET_KEY = "django-insecure-+-=x#$t4ympabt6#3#k=5t2w60%uiz7l6une62r+i6@sw9jds("
+SECRET_KEY = env("SECRET_KEY")
 
 # SECURITY WARNING: don't run with debug turned on in production!
-DEBUG = True
+DEBUG = env("DEBUG")
+DEVELOPMENT_MODE = env("DEVELOPMENT_MODE")
+ALLOWED_HOSTS = ["127.0.0.1"]
+
+
+# Application definition
+
+INSTALLED_APPS = [
+    "django.contrib.admin",
+    "django.contrib.auth",
+    "django.contrib.contenttypes",
+    "django.contrib.sessions",
+    "django.contrib.messages",
+    "django.contrib.staticfiles",
+    "posts.apps.PostConfig",
+    "mainpage.apps.MainpageConfig",
+    "comments.apps.CommentsConfig",
+]
+
+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 = "blog.urls"
+
+TEMPLATES = [
+    {
+        "BACKEND": "django.template.backends.django.DjangoTemplates",
+        "DIRS": [os.path.join(BASE_DIR, "templates")],
+        "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 = "blog.wsgi.application"
+
 
-ALLOWED_HOSTS = []
+# Database
+# https://docs.djangoproject.com/en/4.0/ref/settings/#databases
+
+if DEVELOPMENT_MODE=(bool, False),
+)
+
+# Build paths inside the project like this: BASE_DIR / 'subdir'.
+
+PROJECT_ROOT = os.path.dirname(__file__)
+
+# Quick-start development settings - unsuitable for production
+# See https://docs.djangoproject.com/en/4.0/howto/deployment/checklist/
+
+# SECURITY WARNING: keep the secret key used in production secret!
+SECRET_KEY = env("SECRET_KEY")
+
+# SECURITY WARNING: don't run with debug turned on in production!
+DEBUG = env("DEBUG")
+DEVELOPMENT_MODE = env("DEVELOPMENT_MODE")
+ALLOWED_HOSTS = ["127.0.0.1"]
 
 
 # Application definition
@@ -77,10 +221,20 @@ WSGI_APPLICATION = "blog.wsgi.application"
 # Database
 # https://docs.djangoproject.com/en/4.0/ref/settings/#databases
 
-DATABASES = {
+if DEVELOPMENT_MODE:
+    DATABASES = {
+        "default": {
+            "ENGINE": "django.db.backends.sqlite3",
+            "NAME": os.path.join(BASE_DIR, "db.sqlite3"),
+        }
+    }
+else:
+    DATABASES = {
     "default": {
-        "ENGINE": "django.db.backends.sqlite3",
-        "NAME": BASE_DIR / "db.sqlite3",
+        "ENGINE": "django.db.backends.postgresql",
+        "OPTIONS": {
+            "service": "django_test",
+        }
     }
 }
 
@@ -123,7 +277,7 @@ STATIC_URL = "static/"
 
 # для того чтобы использовать общие статические файлы
 STATICFILES_DIRS = [
-    BASE_DIR / "static",
+    os.path.join(BASE_DIR, "static"),
 ]
 # Default primary key field type
 # https://docs.djangoproject.com/en/4.0/ref/settings/#default-auto-field