Initial commit: add .gitignore and README

env.example

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+# API
+NODE_ENV=development
+API_PORT=4000
+API_HOST=0.0.0.0
+
+# Database (match infra/docker-compose.yml for local dev)
+DATABASE_URL=postgres://sankofa:sankofa_dev@localhost:5432/sankofa
+
+# Object storage (MinIO for dev when using profile 'full')
+S3_ENDPOINT=http://localhost:9000
+S3_ACCESS_KEY=sankofa
+S3_SECRET_KEY=sankofa_dev_minio
+S3_BUCKET=sankofa-documents
+S3_REGION=us-east-1
+S3_USE_SSL=false
+
+# JWT (generate a secret in production)
+JWT_SECRET=change-me-in-production-use-openssl-rand-base64-32
+
+# Ingestion (scraper / email pipeline)
+INGESTION_API_KEY=set-a-secret-key-for-ingestion-endpoint
+
+# Web app (optional; dev proxy uses /api -> localhost:4000)
+# VITE_API_URL=http://localhost:4000
+
+# Optional: SSO placeholder
+# OIDC_ISSUER=
+# OIDC_CLIENT_ID=
+# OIDC_CLIENT_SECRET=
+# SAML_ENTRY_POINT=