add .env.example

Author: davila7

cli-tool/components/sandbox/e2b/.env.example

@@ -0,0 +1,10 @@
+# E2B API Configuration
+# Get your API key from: https://e2b.dev/dashboard
+E2B_API_KEY=your_e2b_api_key_here
+
+# Anthropic API Configuration  
+# Get your API key from: https://console.anthropic.com
+ANTHROPIC_API_KEY=your_anthropic_api_key_here
+
+# Optional: Sandbox timeout in seconds (default: 300)
+# E2B_TIMEOUT=300