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Issue #50 (AmneziaWG 2.0 / awg2): "Failed to generate client keys" when creating clients, and "Invalid server response" on first install. - VpnClient::generateClientKeys() built its own password-only SSH command (PubkeyAuthentication=no, no sudo), bypassing VpnServer::executeCommand. That broke key-based servers and hosts where docker requires sudo. Route it through executeCommand so SSH-key auth and docker sudo auto-detection apply, matching every other remote operation. - VpnClient::getNextClientIP() read /opt/amnezia/awg/wg0.conf only; AWG2 uses awg0.conf. Read awg0.conf first, fall back to wg0.conf. - deploy route: lift PHP time limit (set_time_limit(0) + ignore_user_abort) so the multi-minute awg2 docker build is not killed mid-request, which produced the truncated, non-JSON "Invalid server response". - migration 070: drop `--no-cache` from the awg2 docker build so layers are reused, making installs and retries fast and idempotent. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>