我是Elastic Beanstalk的新手，并且正在将机器学习模型作为API部署在AWS上。我可以将Docker映像部署到Elastic Beanstalk，但是，当我命中端点时，会出现以下错误：
----------------------------------------
/var/log/nginx/error.log
----------------------------------------
2020/10/13 06:43:41 [error] 4588#0: *48 upstream timed out (110: Connection timed out) while `reading response header from upstream, client: X.X.X.X, server: , request: "GET /api HTTP/1.1", upstream: "http://X.Z.X.X:5000/api", host: "myhost.elasticbeanstalk.com"`
当端点被击中时，它似乎正在下载大图像，然后由于超时而停止在82％处：
downloading: 76%|#######6 | 285373440/374434792 [00:30<00:09, 9671567.85B/s]
downloading: 77%|#######6 | 286946304/374434792 [00:30<00:09, 9672961.77B/s]
downloading: 77%|#######7 | 288519168/374434792 [00:31<00:08, 9675716.99B/s]
downloading: 77%|#######7 | 290075648/374434792 [00:31<00:08, 9648885.55B/s]
downloading: 78%|#######7 | 291648512/374434792 [00:31<00:08, 9657378.00B/s]
downloading: 78%|#######8 | 293221376/374434792 [00:31<00:08, 9658259.80B/s]
downloading: 79%|#######8 | 294794240/374434792 [00:31<00:08, 9668126.20B/s]
downloading: 79%|#######9 | 296367104/374434792 [00:31<00:08, 9634858.49B/s]
downloading: 80%|#######9 | 297939968/374434792 [00:32<00:07, 9647173.50B/s]
downloading: 80%|#######9 | 299512832/374434792 [00:32<00:07, 9658200.36B/s]
downloading: 80%|######## | 301069312/374434792 [00:32<00:07, 9632376.91B/s]
downloading: 81%|######## | 302642176/374434792 [00:32<00:07, 9644695.73B/s]
downloading: 81%|########1 | 304215040/374434792 [00:32<00:07, 9634090.57B/s]
downloading: 82%|########1 | 305787904/374434792 [00:32<00:07, 9647709.55B/s]
downloading: 82%|########2 | 307360768/374434792 [00:32<00:06, 96
这是API响应：
<html>
<head><title>504 Gateway Time-out</title></head>
<body>
<center><h1>504 Gateway Time-out</h1></center>
<hr><center>nginx/1.18.0</center>
</body>
</html>
我该怎么办，以便在加载终端节点之前将这些Docker映像预加载到AWS Elastic Beanstalk上？