Add architecture diagram image

Author: Boburmirzo

.devcontainer/devcontainer.json

@@ -1,7 +1,7 @@
 // For format details, see https://aka.ms/devcontainer.json. For config options, see the README at:
 // https://github.com/microsoft/vscode-dev-containers/tree/v0.245.0/containers/python-3
 {
-	"name": "rag-postgres-openai-python",
+	"name": "rag-neon-postgres-openai-azure-python",
 	"dockerComposeFile": "docker-compose.yaml",
 	"service": "app",
 	"workspaceFolder": "/workspace",

.devcontainer/docker-compose.yaml

@@ -17,18 +17,5 @@ services:
     # Runs app on the same network as the database container, allows "forwardPorts" in devcontainer.json function.
     network_mode: service:db
 
-  db:
-    image: pgvector/pgvector:pg16
-    restart: unless-stopped
-    volumes:
-      - postgres-data:/var/lib/postgresql/data
-    environment:
-      POSTGRES_DB: postgres
-      POSTGRES_USER: admin
-      POSTGRES_PASSWORD: postgres
-
-    # Add "forwardPorts": ["5432"] to **devcontainer.json** to forward PostgreSQL locally.
-    # (Adding the "ports" property to this file will not forward from a Codespace.)
-
 volumes:
   postgres-data:

README.md

@@ -39,9 +39,20 @@ This project is designed for deployment on **Azure**, hosting:
 
 ## Architecture diagram
 
-The deployed app uses a user-assigned managed identity to authenticate to Azure services, and stores logs in Log Analytics.
 
-![Architecture diagram: Azure Container Apps, Azure Container Registry, Managed Identity, Azure OpenAI, Azure Database for PostgreSQL](docs/images/azure_architecture.png)
+![Architecture diagram: Azure Container Apps, Azure Container Registry, Managed Identity, Azure OpenAI, Neon Serverless Postgres](docs/images/rag-neon-azure-architecture-diagram.png)
+
+## Azure Resources Used
+
+| Service                     | Purpose                                      |
+|-----------------------------|----------------------------------------------|
+| **Neon Serverless Postgres**| Stores and queries structured data           |
+| **Azure OpenAI**            | Embedding and chat models for RAG            |
+| **Azure Container Apps**    | Deploys the API backend and frontend         |
+| **Azure Container Registry**     | Stores and manages containerized images for frontend and backend        |
+| **Azure Developer CLI**     | Automates deployment and resource management |
+| **Azure Log Analytics**     | Monitors application logs and metrics        |
+
 
 ## Getting started