Change nginx PID file to allow arbitrary user

[SpazzMarticus]

Environments like OpenShift run pods with arbitrary users. AltuisticIsopod's changes resulted in a non-root image - this change allows for arbitrary users.

Fixes #102

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• This change requires a documentation update

🧪 How Has This Been Tested?

Please describe how you tested your changes so that maintainers can verify them. Include enough detail for someone else to reproduce your tests.

Checklist:

• Verified output manually

OpenShift 4.17, vanilla deployment without special privileges

Expected Results:

• Pod starts and serves app.

Actual Results:

• Pod starts and serves app.

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• My changes generate no new warnings