morphnode --mainnet does NOT self-generate config (crash: Config File not found in
/db/config). Add init container that seeds the committed morph/mainnet/node-data/config/
(config.toml + genesis.json, from run-morph-node) into /db/config (no-clobber). Node
renamed morph-node -> morph (cleaner; vol _morph, MORPH_MAINNET_MORPH_* env).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
