Add [redis]: add new env-vars for config, update docs

src/config/utils.py

@@ -28,6 +28,26 @@ class Settings(BaseSettings):
     The .env file is located in the project root.
 
     Env Vars:
+        postgres_host (str):
+         PostgreSQL host name.
+         Defaults to "postgres".
+        postgres_port (int):
+         PostgreSQL port.
+         Defaults to 5432.
+        postgres_user (str):
+         PostgreSQL user name.
+        postgres_pass (str):
+         PostgreSQL user password.
+        postgres_name (str):
+         PostgreSQL database name.
+
+        redis_host (str):
+         Redis host name.
+         Defaults to "redis"
+        redis_port (int):
+         Redis port.
+         Defaults to 6379.
+
         bot_token (str):
          Telegram API bot token.
         listen_logging (bool):
@@ -51,12 +71,16 @@ class Settings(BaseSettings):
 
     @property
     def database_url(self):
+        """Get PostgreSQL database url."""
         return (
             f"postgresql+asyncpg://{self.postgres_user}:"
             f"{self.postgres_pass}@{self.postgres_host}:"
             f"{self.postgres_port}/{self.postgres_name}"
         )
 
+    redis_host: str = Field(frozen=True, default="redis")
+    redis_port: int = Field(frozen=True, default=6379)
+
     bot_token: str = Field(frozen=True)
 
     listen_logging: bool = Field(