Add Go, Java, and Node.js language coverage to add-aspire-existing-app article

[Copilot]

Extends the "Add Aspire to an existing app" guide to cover Go, Java, and Node.js (renamed from JavaScript), following the multi-language pattern established in PR #231.

Changes

• PivotSelector expansion: C#, Python, JavaScript → C#, Python, Node.js, Go, Java (5 languages)
• Terminology alignment: "JavaScript" → "Node.js" throughout for consistency with broader docs
• Go support (10 sections): Prerequisites, file structures, AddGolangApp examples, OpenTelemetry setup, Redis integration
• Java support (10 sections): Prerequisites (Spring Boot, Maven/Gradle), file structures, AddSpringApp examples, OpenTelemetry agent config, Redis integration
• Updated pivot blocks: Language-specific content for navigation, telemetry config, service connections, and next steps

Example structure

Each language now has complete orchestration examples:

// Go microservices
var api = builder.AddGolangApp("api", "./api")
    .WithHttpEndpoint(env: "PORT")
    .WithHttpHealthCheck("/health");

// Java Spring Boot
var api = builder.AddSpringApp("api", "./api")
    .WithHttpEndpoint(port: 8080)
    .WithHttpHealthCheck("/actuator/health");

// Node.js (renamed from JavaScript)
var api = builder.AddNodeApp("api", "./packages/api", "src/server.js")
    .WithNpm()
    .WithHttpHealthCheck("/health");

All sections maintain parallel structure across languages for easy navigation and comparison.

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:

• https://api.github.com/repos/CommunityToolkit/Aspire
  • Triggering command: /usr/local/bin/node node ./scripts/update-github-stats.js (http block)
• https://api.github.com/repos/CommunityToolkit/Aspire/contributors
  • Triggering command: /usr/local/bin/node node /home/REDACTED/work/aspire.dev/aspire.dev/src/frontend/node_modules/.bin/../astro/astro.js build (http block)
• https://api.github.com/repos/dotnet/aspire
  • Triggering command: /usr/local/bin/node node ./scripts/update-github-stats.js (http block)
• https://api.github.com/repos/dotnet/aspire-samples
  • Triggering command: /usr/local/bin/node node ./scripts/update-github-stats.js (http block)
• https://api.github.com/repos/dotnet/aspire-samples/contributors
  • Triggering command: /usr/local/bin/node node /home/REDACTED/work/aspire.dev/aspire.dev/src/frontend/node_modules/.bin/../astro/astro.js build (http block)
• https://api.github.com/repos/dotnet/aspire/contributors
  • Triggering command: /usr/local/bin/node node /home/REDACTED/work/aspire.dev/aspire.dev/src/frontend/node_modules/.bin/../astro/astro.js build (http block)
• https://api.github.com/repos/microsoft/aspire.dev
  • Triggering command: /usr/local/bin/node node ./scripts/update-github-stats.js (http block)
• https://api.github.com/repos/microsoft/aspire.dev/contributors
  • Triggering command: /usr/local/bin/node node /home/REDACTED/work/aspire.dev/aspire.dev/src/frontend/node_modules/.bin/../astro/astro.js build (http block)
• learn.microsoft.com
  • Triggering command: /usr/local/bin/node node /home/REDACTED/work/aspire.dev/aspire.dev/src/frontend/node_modules/.bin/../astro/astro.js build (dns block)
• telemetry.astro.build
  • Triggering command: /usr/local/bin/node node /home/REDACTED/work/aspire.dev/aspire.dev/src/frontend/node_modules/.bin/../astro/astro.js build (dns block)
• vimeo.com
  • Triggering command: /usr/local/bin/node node /home/REDACTED/work/aspire.dev/aspire.dev/src/frontend/node_modules/.bin/../astro/astro.js build (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

Please start a PR to update this article https://aspire.dev/get-started/add-aspire-existing-app and follow what #231 did in terms of adding the rest of the picture for the other languages. I want Node.js, Go, and Java added here please too in the add-existing-app content - and change JavaScript to Node.js.

---

💬 We'd love your input! Share your thoughts on Copilot coding agent in our 2 minute survey.

[IEvangelist]

Please take pictures too of all the different updates. And be sure to Reject cookies. Thanks @copilot.

[Copilot]

Please take pictures too of all the different updates. And be sure to Reject cookies. Thanks @copilot.

Done! I've captured full-page screenshots of all five language options with cookies rejected.

Screenshots:

• C#: https://github.com/user-attachments/assets/f65d142b-e6d5-4d0f-a996-11945da2ea89
• Python: https://github.com/user-attachments/assets/b37addd4-8364-4dc9-9036-be0a6b430fd7
• Node.js: https://github.com/user-attachments/assets/701d5acd-3bb8-4281-be69-982339a3d5b1
• Go: https://github.com/user-attachments/assets/c4008ec5-6746-4c93-8fe2-afb4e455bf4f
• Java: https://github.com/user-attachments/assets/34de0970-a5f6-4ae7-a2b6-7551fc82e7f5

Each screenshot shows the complete article with the language-specific content properly displayed through the PivotSelector.

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:

• https://api.github.com/repos/CommunityToolkit/Aspire
  • Triggering command: /usr/local/bin/node node ./scripts/update-github-stats.js (http block)
• https://api.github.com/repos/dotnet/aspire
  • Triggering command: /usr/local/bin/node node ./scripts/update-github-stats.js (http block)
• https://api.github.com/repos/dotnet/aspire-samples
  • Triggering command: /usr/local/bin/node node ./scripts/update-github-stats.js (http block)
• https://api.github.com/repos/microsoft/aspire.dev
  • Triggering command: /usr/local/bin/node node ./scripts/update-github-stats.js (http block)
• telemetry.astro.build
  • Triggering command: /usr/local/bin/node node /home/REDACTED/work/aspire.dev/aspire.dev/src/frontend/node_modules/.bin/../astro/astro.js dev (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)

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