Add comprehensive API documentation to Cloudron setup instructions

- Added detailed API endpoint information in SETUP-INSTRUCTIONS.md
- Documented API usage with Ente CLI
- Enhanced routing configuration for auth/cast/accounts apps
- Updated to version 0.1.64

setup-ente-cli.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+# Setup Ente CLI for custom server
+
+echo "Setting up Ente CLI for custom server..."
+
+# Create config directory
+mkdir -p ~/.ente
+
+# Create the CLI config with custom endpoint
+cat > ~/.ente/config.yaml << EOF
+host: https://ente.due.ren
+EOF
+
+echo "Configuration created at ~/.ente/config.yaml"
+echo ""
+echo "Now you can add your account:"
+echo "  ente account add"
+echo ""
+echo "Then use admin commands:"
+echo "  ente admin update-subscription --admin-user admin@due.ren --user user@example.com --storage 1000 --valid-for 365"