fix: single worker for SQLite safety, increase healthcheck timeout to 120s

Dockerfile

@@ -39,4 +39,4 @@ EXPOSE 8000
 RUN adduser --disabled-password --gecos "" appuser && chown -R appuser /app
 USER appuser
 
-CMD ["sh", "-c", "uvicorn main:app --host 0.0.0.0 --port $PORT --workers 2"]
+CMD ["sh", "-c", "uvicorn main:app --host 0.0.0.0 --port $PORT --workers 1"]

railway.toml

@@ -3,8 +3,8 @@ builder = "dockerfile"
 dockerfilePath = "Dockerfile"
 
 [deploy]
-startCommand = "uvicorn main:app --host 0.0.0.0 --port $PORT --workers 2"
+startCommand = "uvicorn main:app --host 0.0.0.0 --port $PORT --workers 1"
 healthcheckPath = "/health"
-healthcheckTimeout = 30
+healthcheckTimeout = 120
 restartPolicyType = "on_failure"
 restartPolicyMaxRetries = 3