docs(readme): add step to trust SAP backend self-signed TLS cert

[vaishnavi-kedar-cstk]

What

Adds a Development server step documenting that the storefront is blank on first load until the SAP Commerce (OCC) backend's self-signed TLS certificate is trusted in the browser.

Why

The backend https://40.76.109.9:9002 serves a self-signed cert, so the browser blocks its requests (ERR_CERT_AUTHORITY_INVALID) and Spartacus can't fetch base-site/product data — the page renders empty with no obvious cause. This one-time, per-browser step isn't currently in the README and is the most common first-run stumbling block.

The added step

1. In the same browser, open https://40.76.109.9:9002/occ/v2/basesites
2. Click through the warning (Advanced -> Proceed) to trust it
3. Reload http://localhost:4200/ -- it now hydrates

Docs-only change.

🤖 Generated with Claude Code

[snyk-io]

✅ Snyk checks have passed. No issues have been found so far.

Status	Scan Engine	Critical	High	Medium	Low	Total (0)
✅	Open Source Security	0	0	0	0	0 issues
✅	Licenses	0	0	0	0	0 issues
✅	Code Security	0	0	0	0	0 issues

💻 Catch issues earlier using the plugins for VS Code, JetBrains IDEs, Visual Studio, and Eclipse.

[github-actions]

🔒 Security Scan Results

ℹ️ Note: Only vulnerabilities with available fixes (upgrades or patches) are counted toward thresholds.

Check Type	Count (with fixes)	Without fixes	Threshold	Result
🔴 Critical Severity	0	0	10	✅ Passed
🟠 High Severity	0	0	25	✅ Passed
🟡 Medium Severity	0	4	500	✅ Passed
🔵 Low Severity	0	0	1000	✅ Passed

⏱️ SLA Breach Summary

✅ No SLA breaches detected. All vulnerabilities are within acceptable time thresholds.

Severity	Breaches (with fixes)	Breaches (no fixes)	SLA Threshold (with/no fixes)	Status
🔴 Critical	0	0	15 / 30 days	✅ Passed
🟠 High	0	0	30 / 120 days	✅ Passed
🟡 Medium	0	0	90 / 365 days	✅ Passed
🔵 Low	0	0	180 / 365 days	✅ Passed

ℹ️ Vulnerabilities Without Available Fixes (Informational Only)

The following vulnerabilities were detected but do not have fixes available (no upgrade or patch). These are excluded from failure thresholds:

• Critical without fixes: 0
• High without fixes: 0
• Medium without fixes: 4
• Low without fixes: 0

✅ BUILD PASSED - All security checks passed

[Copilot]

Copilot review overview

🟢 Approval recommended

The documentation-only change fully addresses the required development setup.

Review effort: Lite
Findings: None

What changed in this PR

Documents the browser setup needed to trust the SAP Commerce backend’s self-signed TLS certificate so the storefront loads correctly.

Changes:

• Explains the blank initial storefront and certificate error.
• Adds steps to trust the certificate and reload the storefront.

File	Summary
README.md	Adds first-run TLS certificate trust instructions.

---

💡 Add a code-review agent skill or configure MCP servers for context-aware, tailored reviews. Learn more in the docs.