fix: quote dashboard credentials in kong.yml to handle special characters

[everettbu]

Mirror of supabase/supabase#42028
Original author: 7ttp

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Summary

Kong fails to start when DASHBOARD_PASSWORD contains special YAML characters like @.

Problem

The kong.yml template uses unquoted environment variable placeholders for dashboard credentials.
When DASHBOARD_PASSWORD starts with special characters like @,
the substituted YAML becomes invalid and Kong fails to parse the configuration file.

Solution

Quote the DASHBOARD_USERNAME and DASHBOARD_PASSWORD placeholders in kong.yml to ensure valid YAML after environment variable substitution.

Related

• Closes #42023

Summary by CodeRabbit

• Chores
  • Updated configuration syntax for authentication credentials.

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[everettbu]

Upstream PR was closed or merged. Code is synced via branch mirror.