update README.md

Author: GwonHyeok

README.md

@@ -1,9 +1,50 @@
 # AI Doctor Bot
 
+## Configuration
+
+### Secret Values
+
+The application requires several secret configuration values that should be stored in a values-secret.yaml file. This
+file is excluded from version control (via .gitignore).
+Create a values-secret.yaml file in the charts/chart/ directory with the following structure:
+
+```yaml
+apps:
+  - name: ai-doctor-bot
+    replicaCount: 1
+    env:
+      # Database configuration
+      DATABASE_URL: "postgresql://username:password@hostname:5432/database_name"
+
+      # Reddit API credentials
+      REDDIT_USERNAME: "your_reddit_username"
+      REDDIT_PASSWORD: "your_reddit_password"
+      REDDIT_USER_AGENT: "your_user_agent" # e.g., "AI Doctor Bot v1.0 by /u/your_username"
+      REDDIT_CLIENT_ID: "your_reddit_client_id"
+      REDDIT_CLIENT_SECRET: "your_reddit_client_secret"
+      REDDIT_SUBREDDIT: "subreddit_name" # e.g., "askdocs" (without the r/)
+
+      # Application configuration
+      SLEEP_DURATION: "60" # Time in seconds to wait between processing posts
+      ASSISTANT_MODE_ID: "your_assistant_mode_id" # ID from the database for the assistant mode to use
+
+      # LangChain configuration (if using LangSmith)
+      LANGCHAIN_API_KEY: "your_langchain_api_key" # Optional
+      LANGCHAIN_PROJECT: "ai-doctor-bot" # Optional
+      LANGCHAIN_TRACING_V2: "true" # Optional
+```
+
+Replace the placeholder values with your actual configuration. The application uses these environment variables to
+connect to the PostgreSQL database, authenticate with Reddit's API, and configure the behavior of the AI doctor bot.
+
+## Deployment
+
 ```shell
 $ helm upgrade --install ai-doctor-bot ./chart -f ./chart/values.yaml -f ./chart/values-secret.yaml
 ```
 
+## Uninstall
+
 ```shell
 helm uninstall ai-doctor-bot
 ```