chore: First entities setup, made connection to database, added central API to request environment variables for our app.

docker-compose.yml

@@ -6,8 +6,7 @@ services:
       POSTGRES_PASSWORD: postgres
       POSTGRES_DB: postgres
     ports:
-      - "5432:5432"
-    network_mode: "host"
+      - "5431:5432"
     volumes:
         - postgres_data:/var/lib/postgresql/data
         - ./backend/config/db/init.sql:/docker-entrypoint-initdb.d/init.sql