nessi 6349147d8d feat: add backend DNS resolution check and improve gateway sync reliability ...

Add wait_for_backend_dns function to verify backend hostname resolution before attempting bootstrap/sync operations. Configure NEXAVPN_BACKEND_HOST environment variable and net.ipv4.ip_forward sysctl in docker-compose. Use atomic write pattern for state.json via temporary file to prevent corruption on failed downloads. Make sysctl ip_forward call conditional on write permissions and non-fatal.

2026-03-17 19:21:39 +01:00

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