- Private key from `/run/secrets/wireguard_private_key` (path configurable with `WIREGUARD_PRIVATE_KEY_SECRETFILE`)
- Preshared key from `/run/secrets/wireguard_preshared_key` (path configurable with `WIREGUARD_PRESHARED_KEY_SECRETFILE`)
- Addresses from `/run/secrets/wireguard_addresses` (path configurable with `WIREGUARD_ADDRESSES_SECRETFILE`)