My django app has ben running for about 3 months now.

I intermittently get a 502 Bad Gateway error message on any page,

I will even get this error the Django admin page, so I don't think its my code. Most of the time the page loads fine, or if I just reload it will load.

can someone help me understand where I'm making a mistake

The output from sudo tail -20 /var/log/nginx/error.log yields:

2022/03/29 16:12:56 [error] 720#720: *8182 upstream prematurely closed connection while reading response header from upstream, client: 165.225.38.84, server: _, request: "GET /backyard/ HTTP/1.1", upstream: "http://unix:/home/django/gunicorn.socket:/backyard/", host: "104.131.165.99", referrer: "http://104.131.165.99/backyard/"
2022/03/29 16:19:44 [error] 720#720: *8188 upstream prematurely closed connection while reading response header from upstream, client: 165.225.38.84, server: _, request: "GET /garage/ HTTP/1.1", upstream: "http://unix:/home/django/gunicorn.socket:/garage/", host: "104.131.165.99", referrer: "http://104.131.165.99/garage/"
2022/03/29 16:26:29 [error] 720#720: *8194 upstream prematurely closed connection while reading response header from upstream, client: 165.225.38.84, server: _, request: "GET /garage/ HTTP/1.1", upstream: "http://unix:/home/django/gunicorn.socket:/garage/", host: "104.131.165.99", referrer: "http://104.131.165.99/garage/"
2022/03/29 16:36:30 [error] 720#720: *8205 upstream prematurely closed connection while reading response header from upstream, client: 165.225.38.84, server: _, request: "GET /garage/ HTTP/1.1", upstream: "http://unix:/home/django/gunicorn.socket:/garage/", host: "104.131.165.99", referrer: "http://104.131.165.99/garage/"
2022/03/29 16:42:58 [error] 720#720: *8209 upstream prematurely closed connection while reading response header from upstream, client: 165.225.38.84, server: _, request: "GET /backyard/ HTTP/1.1", upstream: "http://unix:/home/django/gunicorn.socket:/backyard/", host: "104.131.165.99", referrer: "http://104.131.165.99/backyard/"
2022/03/29 16:49:45 [error] 720#720: *8221 upstream prematurely closed connection while reading response header from upstream, client: 165.225.38.84, server: _, request: "GET /garage/ HTTP/1.1", upstream: "http://unix:/home/django/gunicorn.socket:/garage/", host: "104.131.165.99", referrer: "http://104.131.165.99/garage/"
2022/03/29 17:09:45 [error] 720#720: *8244 upstream prematurely closed connection while reading response header from upstream, client: 165.225.38.84, server: _, request: "GET /garage/ HTTP/1.1", upstream: "http://unix:/home/django/gunicorn.socket:/garage/", host: "104.131.165.99", referrer: "http://104.131.165.99/garage/"
2022/03/29 17:12:57 [error] 720#720: *8251 upstream prematurely closed connection while reading response header from upstream, client: 165.225.38.84, server: _, request: "GET /backyard/ HTTP/1.1", upstream: "http://unix:/home/django/gunicorn.socket:/backyard/", host: "104.131.165.99", referrer: "http://104.131.165.99/backyard/"
2022/03/29 17:16:54 [error] 720#720: *8255 upstream prematurely closed connection while reading response header from upstream, client: 165.225.38.84, server: _, request: "GET /garage/ HTTP/1.1", upstream: "http://unix:/home/django/gunicorn.socket:/garage/", host: "104.131.165.99", referrer: "http://104.131.165.99/garage/"
2022/03/29 17:23:04 [error] 720#720: *8261 upstream prematurely closed connection while reading response header from upstream, client: 165.225.38.84, server: _, request: "GET /garage/ HTTP/1.1", upstream: "http://unix:/home/django/gunicorn.socket:/garage/", host: "104.131.165.99", referrer: "http://104.131.165.99/garage/"
2022/03/29 17:29:44 [error] 720#720: *8265 upstream prematurely closed connection while reading response header from upstream, client: 165.225.38.84, server: _, request: "GET /garage/ HTTP/1.1", upstream: "http://unix:/home/django/gunicorn.socket:/garage/", host: "104.131.165.99", referrer: "http://104.131.165.99/garage/"
2022/03/29 17:33:10 [error] 720#720: *8269 upstream prematurely closed connection while reading response header from upstream, client: 165.225.38.84, server: _, request: "GET /garage/ HTTP/1.1", upstream: "http://unix:/home/django/gunicorn.socket:/garage/", host: "104.131.165.99", referrer: "http://104.131.165.99/garage/"
2022/03/29 17:46:25 [error] 720#720: *8282 upstream prematurely closed connection while reading response header from upstream, client: 165.225.38.84, server: _, request: "GET /garage/ HTTP/1.1", upstream: "http://unix:/home/django/gunicorn.socket:/garage/", host: "104.131.165.99", referrer: "http://104.131.165.99/garage/"
2022/03/29 17:49:47 [error] 720#720: *8284 upstream prematurely closed connection while reading response header from upstream, client: 165.225.38.84, server: _, request: "GET /garage/ HTTP/1.1", upstream: "http://unix:/home/django/gunicorn.socket:/garage/", host: "104.131.165.99", referrer: "http://104.131.165.99/garage/"
2022/03/29 18:40:19 [error] 720#720: *8303 upstream prematurely closed connection while reading response header from upstream, client: 73.178.103.149, server: _, request: "GET /garage/ HTTP/1.1", upstream: "http://unix:/home/django/gunicorn.socket:/garage/", host: "104.131.165.99"
2022/03/29 18:44:53 [error] 720#720: *8310 upstream prematurely closed connection while reading response header from upstream, client: 73.178.103.149, server: _, request: "GET /garage/ HTTP/1.1", upstream: "http://unix:/home/django/gunicorn.socket:/garage/", host: "104.131.165.99", referrer: "http://104.131.165.99/garage/"
2022/03/29 18:50:50 [error] 720#720: *8320 upstream prematurely closed connection while reading response header from upstream, client: 73.178.103.149, server: _, request: "GET /admin/ HTTP/1.1", upstream: "http://unix:/home/django/gunicorn.socket:/admin/", host: "104.131.165.99"
2022/03/29 18:51:19 [error] 720#720: *8319 upstream timed out (110: Connection timed out) while reading response header from upstream, client: 73.178.103.149, server: _, request: "GET /garage/ HTTP/1.1", upstream: "http://unix:/home/django/gunicorn.socket/garage/", host: "104.131.165.99", referrer: "http://104.131.165.99/garage/"
2022/03/29 18:52:56 [error] 720#720: *8324 upstream prematurely closed connection while reading response header from upstream, client: 73.178.103.149, server: _, request: "GET /garage/ HTTP/1.1", upstream: "http://unix:/home/django/gunicorn.socket:/garage/", host: "104.131.165.99", referrer: "http://104.131.165.99/garage/"
2022/03/29 18:52:56 [error] 720#720: *8327 upstream prematurely closed connection while reading response header from upstream, client: 165.225.38.84, server: _, request: "GET /backyard/ HTTP/1.1", upstream: "http://unix:/home/django/gunicorn.socket:/backyard/", host: "104.131.165.99", referrer: "http://104.131.165.99/backyard/"