Fix Supervisor startup issues

- Add startup script for production deployment
- Create Supervisor configuration file
- Update main.py to ensure database initialization at startup
- Add configurable port via environment variable
- Add Supervisor setup instructions to README
- Initialize database at application startup

README.md

@@ -40,7 +40,9 @@ This is a FastAPI application that provides a simple generic REST API service wi
 │       └── item.py           # Item schema
 ├── alembic.ini               # Alembic configuration
 ├── main.py                   # Application entry point
-└── requirements.txt          # Project dependencies
+├── requirements.txt          # Project dependencies
+├── start.sh                  # Production startup script
+└── supervisor.conf           # Supervisor configuration
 ```
 
 ## Setup and Installation
@@ -77,12 +79,39 @@ PYTHONPATH=$PWD alembic upgrade head
 
 5. Start the application:
 
+**Development mode:**
+
 ```bash
 uvicorn main:app --reload
 ```
 
 The application will be available at http://127.0.0.1:8000.
 
+**Production mode with Supervisor:**
+
+The application comes with a Supervisor configuration file for production deployment:
+
+```bash
+# Make the start script executable
+chmod +x start.sh
+
+# Copy the supervisor configuration to the supervisor config directory
+cp supervisor.conf /etc/supervisor/conf.d/fastapi-app.conf
+
+# Restart supervisor to load the new configuration
+supervisorctl reread
+supervisorctl update
+
+# Check the status of the application
+supervisorctl status app-8001
+
+# View logs if needed
+tail -f /var/log/supervisor/app-8001_stdout.log
+tail -f /var/log/supervisor/app-8001_stderr.log
+```
+
+The application will be available at http://127.0.0.1:8001 when running with Supervisor.
+
 ## API Documentation
 
 Once the application is running, you can access the automatically generated API documentation:

main.py

@@ -1,8 +1,13 @@
+import os
 import uvicorn
 from fastapi import FastAPI
 from app.api.api import api_router
 from app.core.config import settings
 
+# Initialize database at startup
+from app.db.init_db import init_db
+init_db()
+
 app = FastAPI(
     title=settings.PROJECT_NAME,
     openapi_url=f"{settings.API_V1_STR}/openapi.json",
@@ -12,5 +17,13 @@ app = FastAPI(
 
 app.include_router(api_router, prefix=settings.API_V1_STR)
 
+# Add startup event to ensure proper initialization
+@app.on_event("startup")
+async def startup_event():
+    # Any additional initialization can go here
+    print("Application startup complete")
+
 if __name__ == "__main__":
-    uvicorn.run("main:app", host="0.0.0.0", port=8000, reload=True)
+    # Get port from environment variable or default to 8000
+    port = int(os.environ.get("PORT", 8000))
+    uvicorn.run("main:app", host="0.0.0.0", port=port, reload=True)

start.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+# Start script for the FastAPI application
+
+# Set environment variables if needed
+export PYTHONPATH=/app
+
+# Navigate to the application directory
+cd /app
+
+# Start the application with uvicorn
+exec uvicorn main:app --host 0.0.0.0 --port 8001 --workers 4 --no-access-log

supervisor.conf

@@ -0,0 +1,14 @@
+[program:app-8001]
+command=/app/start.sh
+directory=/app
+user=root
+autostart=true
+autorestart=true
+startretries=5
+numprocs=1
+startsecs=1
+process_name=%(program_name)s_%(process_num)02d
+stderr_logfile=/var/log/supervisor/%(program_name)s_stderr.log
+stderr_logfile_maxbytes=10MB
+stdout_logfile=/var/log/supervisor/%(program_name)s_stdout.log
+stdout_logfile_maxbytes=10MB