chore: add environment template

.env.example

@@ -0,0 +1,33 @@
+NODE_ENV=development
+HOST=127.0.0.1
+PORT=8124
+PUBLIC_BASE_URL=http://localhost:8124
+TRUST_PROXY=0
+COOKIE_SECURE=false
+COOKIE_SAMESITE=lax
+ALLOWED_ORIGINS=http://localhost:8124
+
+DATA_DIR=./data
+DB_PATH=./db/vendoo.db
+UPLOAD_DIR=./uploads
+BACKUP_DIR=./backups
+
+SESSION_SECRET=
+ANTHROPIC_API_KEY=
+OPENAI_API_KEY=
+OPENROUTER_API_KEY=
+OLLAMA_URL=http://localhost:11434
+
+SMTP_HOST=
+SMTP_PORT=587
+SMTP_SECURE=false
+SMTP_USER=
+SMTP_PASSWORD=
+SMTP_FROM=
+
+ETSY_API_KEY=
+ETSY_CLIENT_SECRET=
+EBAY_CLIENT_ID=
+EBAY_CLIENT_SECRET=
+EBAY_RUNAME=
+EBAY_SANDBOX=true