nginx - Connection reset by peer

Preflight checklist

• I could not find a solution in the existing issues, docs, nor discussions.
• I agree to follow this project's Code of Conduct.
• I have read and am following this repository's Contribution Guidelines.
• This issue affects my Ory Network project.
• I have joined the Ory Community Slack.
• I am signed up to the Ory Security Patch Newsletter.

Describe the bug

This documentation: https://www.ory.sh/docs/hydra/self-hosted/deploy-hydra-example does not give the expected result.

Reproducing the bug

Follow this documentation as it is

https://www.ory.sh/docs/hydra/self-hosted/deploy-hydra-example

Relevant log output

2022/10/27 01:24:49 [error] 3017452#3017452: *2732 readv() failed (104: Connection reset by peer) while reading upstream, client: 136.158.83.131, server: sso.sunwatt.io, request: "GET /health?secret=CHANGE-ME-INSECURE-PASSWORD HTTP/1.1", upstream: "http://127.0.0.1:4445/health?secret=CHANGE-ME-INSECURE-PASSWORD", host: "sso.sunwatt.io"

Relevant configuration

serve:
  cookies:
    same_site_mode: Lax

urls:
  self:
    issuer: http://127.0.0.1:4444
  consent: http://127.0.0.1:3000/consent
  login: http://127.0.0.1:3000/login
  logout: http://127.0.0.1:3000/logout

secrets:
  system:
    - youReallyNeedToChangeThis

oidc:
  subject_identifiers:
    supported_types:
      - pairwise
      - public
    pairwise:
      salt: youReallyNeedToChangeThis

dsn: postgres://hydra:Minski1234@127.0.0.1:5432/hydra?sslmode=disable&max_conns=20&max_idle_conns=4
urls:
  self:
    issuer: https://sso.sunwatt.io


log:
  level: debug
  format: text
  leak_sensitive_values: true

Version

v1.11.10

On which operating system are you observing this issue?

Linux

In which environment are you deploying?

No response

Additional Context

No response

Start with the linked deploy-hydra-example documentation and compare its nginx setup with the reported upstream log and supplied Hydra configuration. Confirm the cause of the connection reset, then update the deployment documentation so the documented setup works or clearly explains the required configuration; validate by following the reproduction steps.