Add clarifying comments for service discovery port registration

[Copilot]

The template generated projects with service discovery (Eureka/Consul) but lacked context on how port registration works, particularly for local development.

Changes

• Added inline comments explaining service discovery client registration in Program.cs
• Documented automatic port detection for Steeltoe v4 (DynamicPortAssignmentHostedService reads from IServerAddressesFeature)
• Clarified cloud hosting setup for Steeltoe v3

Example Output

Steeltoe v4 with Eureka:

// Registers this application with Eureka for service discovery.
// Port registration is automatically detected from the server's listening addresses.
builder.Services.AddEurekaDiscoveryClient();

Steeltoe v3 with cloud hosting:

// Configures the application to listen on the port(s) provided by the cloud platform.
builder.UseCloudHosting();
// Registers this application with a service discovery provider (e.g., Eureka, Consul).
builder.Services.AddDiscoveryClient(builder.Configuration);

Technical Notes

No changes to appsettings.Development.json needed - Steeltoe v4's DynamicPortAssignmentHostedService automatically detects ports after server startup. Steeltoe v3 correctly uses ports from launchSettings.json.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• 8yfvsblobprodwus2171.blob.core.windows.net
  • Triggering command: /usr/bin/dotnet dotnet restore --no-dependencies /home/REDACTED/work/NetCoreToolTemplates/.codeql-scratch/dbs/csharp/working/6976045FF0075E801429782E65F3A860/missingpackages_workingdir --packages /home/REDACTED/work/NetCoreToolTemplates/.codeql-scratch/dbs/csharp/working/missingpackages /p:DisableImplicitNuGetFallbackFolder=true --verbosity normal --configfile /home/REDACTED/work/NetCoreToolTemplates/.codeql-scratch/dbs/csharp/working/nugetconfig/nuget.config --force conf�� onfig/nuget.config credential.username rgo/bin/bash (dns block)
• docs.steeltoe.io
  • Triggering command: /usr/bin/curl curl -s REDACTED (dns block)
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node /home/REDACTED/work/_temp/ghcca-node/node/bin/node --enable-source-maps /home/REDACTED/work/_temp/copilot-developer-action-main/dist/index.js (dns block)
• xumvsblobprodwus213.blob.core.windows.net
  • Triggering command: /usr/share/dotnet/dotnet dotnet new steeltoe-webapi --discovery-eureka --steeltoe 4.*-main-* --framework net8.0 --language C# (dns block)
  • Triggering command: /usr/share/dotnet/dotnet dotnet build /p:TreatWarningsAsErrors=True /p:EnforceCodeStyleInBuild=True /p:GenerateDocumentationFile=True (dns block)
  • Triggering command: /usr/share/dotnet/dotnet dotnet new steeltoe-webapi --discovery-eureka --steeltoe 4.*-main-* --framework net10.0 --language C# (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

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This section details on the original issue you should resolve

<issue_title>Initializer with .NET 6 and Eureka has some unexpected behaviour when run locally - also some suggestions</issue_title>
<issue_description>Please be sure to check the existing issues (both open and closed!).

Issue description

The way the sample app is created now is somewhat confusing.
launchsettings.json only has http://localhost:5000 - I would expect it to also contain https://localhost:5001
Program is using .UseCloudHosting(<PORTNUMBER>), I would at least expect this to have .UseCloudHosting(<PORTNUMBER>, <SECUREPORTNUMBER>)
When running locally, without "Urls":"https://localhost:5001" in the appsettings.json the app will not register localhost - suggestion - add this by default to the appsettings.Development.json file.

I would also suggest adding code comments to draw the user's attention to the various moving parts to greater assist with their learning and comprehension.

I would also consider using the minimal hosting pattern for .NET 6 as this is more in line with current MS dotnet new templates.

@ccheetham and I discussed the above on a call
</issue_description>

<agent_instructions>I think the majority of this has been addressed, but please double-check and add anything we've missed</agent_instructions>

Comments on the Issue (you are @copilot in this section)

• Fixes Initializer with .NET 6 and Eureka has some unexpected behaviour when run locally - also some suggestions #81

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