Make HF startup path simpler and add explicit startup logging

Dockerfile

@@ -19,7 +19,7 @@ COPY requirements.txt .
 RUN pip install --no-cache-dir -r requirements.txt
 
 # Cache-bust: increment to force a fresh COPY on HF Spaces
-ENV APP_BUILD=2
+ENV APP_BUILD=3
 
 # Copy application code
 COPY . .
@@ -29,10 +29,10 @@ RUN mkdir -p data/overlays && chown -R appuser:appuser /app
 
 USER appuser
 
-# HF Spaces expects port 7860; Render expects 10000
-# Use PORT env var with 7860 as default (works for both)
+# HF Spaces expects port 7860.
 ENV PORT=7860
+ENV PYTHONUNBUFFERED=1
 EXPOSE 7860
 
-# Single process: uvicorn only (simpler for HF Spaces; avoid gunicorn restart issues)
-CMD ["sh", "-c", "exec uvicorn app.main:app --host 0.0.0.0 --port ${PORT}"]
+# Use direct exec form so container startup is simpler and logs flush reliably.
+CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "7860", "--log-level", "info"]

app/main.py

@@ -29,9 +29,12 @@ from .models import User, DetectionRun
 from .notifier import send_notification, send_test_email
 
 import logging
+logging.basicConfig(level=logging.INFO)
 logger = logging.getLogger(__name__)
 
 
+logger.info("Importing AI Change Detection app module")
+
 _IST = timezone(timedelta(hours=5, minutes=30))
 
 
@@ -45,6 +48,7 @@ def _isoformat_ist(dt):
 
 # Create tables and run migrations without crashing the app (HF Spaces can restart if startup fails)
 try:
+    logger.info("Running database initialization")
     Base.metadata.create_all(bind=engine, checkfirst=True)
     with engine.connect() as conn:
         for col, col_type in [
@@ -60,6 +64,7 @@ try:
                 conn.commit()
             except Exception:
                 conn.rollback()
+    logger.info("Database initialization complete")
 except Exception as e:
     import logging
     logging.getLogger("uvicorn.error").warning("Startup migration skipped: %s", e)
@@ -73,6 +78,11 @@ def health():
     from datetime import datetime
     return {"status": "ok", "version": "2.1.0", "server_time_ist": _isoformat_ist(datetime.now(timezone.utc))}
 
+
+@app.on_event("startup")
+def log_startup():
+    logger.info("FastAPI startup event completed")
+
 # Mount static files
 STATIC_DIR = Path(__file__).resolve().parent.parent / "static"
 TEMPLATES_DIR = Path(__file__).resolve().parent.parent / "templates"