DUNITER_LISTEN_ADDR: --listen-addr <value> (optional, no default)
DUNITER_ROC_CORS: --rpc-cors <value> (optional, default: all)
DUNITER_VALIDATOR: --validator --rpc-methods Unsafe (optional, boolean,
default false)
DUNITER_DISABLE_TELEMETRY: --no-telemetry (optional, boolean, default false)

When this variable exists and is not empty, add this option:
  --public-addr "$DUNITER_PUBLIC_ADDR"

Example:
  DUNITER_PUBLIC_ADDR=/dns/example.com/tcp/443/wss

DUNITER_INSTANCE_NAME is still accepted if DUNITER_NODE_NAME is not
defined.