Never commit .env, RPC credentials, private keys, seed phrases, keystore passwords, database passwords, or API keys. Every NEXT_PUBLIC_ value is exposed to browsers.
Application and chain
Frontend
Data and services
Indexer
INDEXER_MODE, INDEXER_START_BLOCK, INDEXER_STOP_BLOCK, INDEXER_CONFIRMATIONS, INDEXER_BATCH_SIZE, INDEXER_RPC_MAX_ATTEMPTS, INDEXER_RPC_INITIAL_DELAY_MS, INDEXER_RPC_MAX_DELAY_MS, ZONK_INDEXER_CONTRACTS, and ZONK_FACTORY_V3_ADDRESS configure ingestion and replay.
Deployment-only
The template also contains canonical Uniswap deployment inputs and governance/Safe variables. Those are operator inputs, not normal application runtime configuration. Mainnet deployment does not read DEPLOYER_PRIVATE_KEY; never introduce a raw Mainnet key into environment files.