Add db configuration

src/config.js

@@ -9,6 +9,13 @@ const owm = {
 };
 
 
+const database = {
+  host: process.env.DB_HOST,
+  user: process.env.DB_USER,
+  password: process.env.DB_PASSWORD,
+};
+
+
 const telegram = {
   token: process.env.TELEGRAM_TOKEN,
 };
@@ -17,6 +24,7 @@ const telegram = {
 const config = {
   owm,
   telegram,
+  database,
 };