Create devcontainer.json

[sangshanrupesh]

Fixes #[insert GH or internal issue link(s)].

Describe your change...

---

• Tests
  • TODO (before merge)
  • Tests included
  • Tests not necessary because:
• Wrangler E2E Tests CI Job required? (Use "e2e" label or ask maintainer to run separately)
  • I don't know
  • Required
  • Not required because:
• Public documentation
  • TODO (before merge)
  • Cloudflare docs PR(s):
  • Documentation not necessary because:

[changeset-bot]

⚠️ No Changeset found

Latest commit: 74fd1ad

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[penalosa]

Could you add some more details here? In particular, it'd be helpful to know why this file is being added, what it enables, and what the benefit is to users?