adding database service

Author: devshad-01

docker-compose.yml

@@ -17,16 +17,27 @@ services:
     command:
       #speifying default run command
       sh -c "python manage.py runserver 0.0.0.0:8000"
-  db:
-    image: postgress:13-alphine
+      
+    environment:
+      - DB_HOST=db
+      - DB_NAME=devdb
+      - DB_USER=devuser
+      - DB_PASSWORD=changeme
+    depends_on:
+      - db
+  db: 
+    image: postgres:13-alpine
+
     volumes:
-      - dev-db-data:var/lib/postgresql/data
+      - dev-db-data:/var/lib/postgresql/data
+
     environment:
-      - POSTGRES_DB: devdb
-      - POSTGRES_USER: devuser
-      - POSTGRES_PASSWORD: changeme
+      - POSTGRES_DB=devdb
+      - POSTGRES_USER=devuser
+      - POSTGRES_PASSWORD=changeme
+
 
 volumes:
   dev-db-data:
-    
+