Embed templates into binary using Go embed package

[Copilot]

Bundles template files into the Go binary at compile time, eliminating runtime filesystem dependencies.

Changes

• main.go: Use //go:embed templates/* directive with template.ParseFS() instead of template.ParseFiles()
• Dockerfile: Remove COPY --from=builder /app/templates /templates line

//go:embed templates/*
var templatesFS embed.FS

// ...
tpl := template.Must(template.ParseFS(templatesFS, "templates/index.html"))

Original prompt

Update this application so that the files it depends on at runtime, specifically the templates and static files, are baked into the binary. The goal here is to make the minimal changes to the Go code so these are bundled and no longer need to be present on the filesystem at runtime.

The current implementation runs as a Docker container and these files are being copied over into the container. The goal is to specifically remove these lines of code from the Dockerfile but otherwise leave the Dockerfile unchanged.

Copy the template folder into the runtime container

COPY --from=builder /app/templates /templates

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 0.00%. Comparing base (7597478) to head (25cb549).
⚠️ Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
main.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff          @@
##            main    #111   +/-   ##
=====================================
  Coverage   0.00%   0.00%           
=====================================
  Files          3       3           
  Lines        118     118           
=====================================
  Misses       118     118           

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