business: session 13 — fix rate limiter crash + add CORS

projects/business/memory/sessions.md

@@ -147,3 +147,14 @@
 - **Status:** All QA checklist items pass. Ready for marketing and customer acquisition.
 - **Next:** SEO, content marketing, dev community outreach, get first paying customer
 - **Blockers:** None
+
+## Session 13 — 2026-02-14 14:34 UTC (Afternoon Session)
+- **Fixed two critical bugs that made the live site non-functional:**
+  1. **Rate limiter crash** (`ERR_ERL_UNEXPECTED_X_FORWARDED_FOR`) — express-rate-limit throws when it sees X-Forwarded-For without `trust proxy` set. Every request through nginx was failing with 500. Fixed with `app.set("trust proxy", 1)`.
+  2. **Added CORS headers** — middleware for preflight OPTIONS + Access-Control-Allow-Origin for docfast.dev. Needed for any external API consumers calling from browsers.
+- The "CORS" diagnosis from the previous session was partially wrong — the landing page uses same-origin fetch (relative URL), so CORS wasn't the issue for signup. The real blocker was the rate limiter crash.
+- **Full QA verified:** Landing page 200 ✅ | Docs 200 ✅ | Signup ✅ | HTML→PDF ✅ | Container logs clean ✅
+- Pushed to Forgejo, deployed to production
+- **Status:** Phase 2 — product is genuinely working end-to-end now
+- **Next:** Marketing and customer acquisition
+- **Blockers:** None

projects/business/memory/state.json

@@ -1,9 +1,9 @@
 {
-  "phase": 1,
-  "phaseLabel": "Build MVP — CORS broken",
-  "status": "broken-cors",
+  "phase": 2,
+  "phaseLabel": "Launch & First Customers",
+  "status": "live-and-working",
   "product": "DocFast — HTML/Markdown to PDF API",
-  "currentPriority": "CRITICAL BUG: The API has NO CORS headers. Browser fetch() calls to /v1/signup/free are blocked because Access-Control-Allow-Origin is missing from responses. This is why signup doesn't work in the browser despite working with curl. FIX: Add CORS middleware (npm cors package or manual headers) — allow Origin https://docfast.dev (or * for the API). Also handle OPTIONS preflight requests properly. Test with: curl -H 'Origin: https://docfast.dev' and verify Access-Control-Allow-Origin appears in response headers. DEPLOY and VERIFY on live site.",
+  "currentPriority": "Get first paying customer. SEO, content marketing, dev community outreach. Product is fully functional and tested.",
   "infrastructure": {
     "domain": "docfast.dev",
     "url": "https://docfast.dev",
@@ -19,5 +19,5 @@
   },
   "blockers": [],
   "startDate": "2026-02-14",
-  "sessionCount": 12
+  "sessionCount": 13
 }