chore: Add .gitignore and .env.example

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.env.example

@@ -0,0 +1,33 @@
+# Corrosion Platform — Environment Variables
+# Copy to .env and fill in values
+
+# Database
+DATABASE_URL=postgres://corrosion:corrosion_dev@localhost:5432/corrosion
+DATABASE_MAX_CONNECTIONS=20
+DB_PASSWORD=corrosion_dev
+
+# NATS
+NATS_URL=nats://localhost:4222
+
+# Auth
+JWT_SECRET=change-me-to-a-random-64-char-string
+ENCRYPTION_KEY=change-me-to-a-random-32-byte-hex-key
+
+# Cloudflare (subdomain provisioning)
+CLOUDFLARE_API_TOKEN=
+CLOUDFLARE_ZONE_ID=
+BASE_DOMAIN=corrosionmgmt.com
+
+# Steam API (force wipe detection)
+STEAM_API_KEY=
+
+# Email (SMTP)
+SMTP_HOST=smtp.example.com
+SMTP_PORT=587
+SMTP_USERNAME=
+SMTP_PASSWORD=
+SMTP_FROM=noreply@corrosionmgmt.com
+
+# Server
+API_PORT=3000
+FRONTEND_URL=http://localhost:5174