Add basic PostgreSQL deployment with pgAdmin

postgresql/docker-compose.yml

@@ -0,0 +1,40 @@
+services:
+  postgres:
+    image: postgres:16
+    container_name: postgres_db
+    restart: unless-stopped
+    environment:
+      POSTGRES_USER: postgres
+      POSTGRES_PASSWORD: your_secure_password_here
+      POSTGRES_DB: myapp
+      PGDATA: /var/lib/postgresql/data/pgdata
+    volumes:
+      - postgres_data:/var/lib/postgresql/data
+    ports:
+      - "5432:5432"
+    networks:
+      - postgres_network
+
+  pgadmin:
+    image: dpage/pgadmin4:latest
+    container_name: pgadmin
+    restart: unless-stopped
+    environment:
+      PGADMIN_DEFAULT_EMAIL: admin@example.com
+      PGADMIN_DEFAULT_PASSWORD: admin_password_here
+    volumes:
+      - pgadmin_data:/var/lib/pgadmin
+    ports:
+      - "8080:80"
+    networks:
+      - postgres_network
+    depends_on:
+      - postgres
+
+volumes:
+  postgres_data:
+  pgadmin_data:
+
+networks:
+  postgres_network:
+    driver: bridge