Description

This pull request adds support for configuring proxy-related HTTP headers in the E2E search tests by introducing new environment variables. This allows the tests to be more flexible and adaptable to different deployment environments.

Test configuration improvements:

• Added two new environment variables, TestProxyForwardedHost and TestProxyForwardedPrefix, to KnownEnvironmentVariableNames for configuring proxy header values.
• Updated the default environment variable values in EnvironmentVariables to include the new proxy variables.

Test code enhancements:

• Modified SearchProxyTests to use the new environment variables for the Host and Prefix values, making the proxy header values configurable per environment.

Related issues

Addresses AB#180168.

Testing

Describe how this change was tested.

FHIR Team Checklist

• Update the title of the PR to be succinct and less than 65 characters
• Add a milestone to the PR for the sprint that it is merged (i.e. add S47)
• Tag the PR with the type of update: Bug, Build, Dependencies, Enhancement, New-Feature or Documentation
• Tag the PR with Open source, Azure API for FHIR (CosmosDB or common code) or Azure Healthcare APIs (SQL or common code) to specify where this change is intended to be released.
• Tag the PR with Schema Version backward compatible or Schema Version backward incompatible or Schema Version unchanged if this adds or updates Sql script which is/is not backward compatible with the code.
• When changing or adding behavior, if your code modifies the system design or changes design assumptions, please create and include an ADR.
• CI is green before merge
• Review squash-merge requirements

Semver Change (docs)

Patch|Skip|Feature|Breaking (reason)