-testnet

-rest Accept public REST requests (default: 0)
-server Accept command line and JSON-RPC commands
-reindex Rebuild chain state and block index from the blk*.dat files on disk. This will also rebuild active optional indexes.
-rpcauth
-datadir=<dir> Specify data directory
-whitelist=
-listenonion Tor
-chain
-prune

bitcoind, .bitcoin/, bitcoin.conf, Dockerfile, Bitcoind ports( 8332 18332 18443 8333 18333 18444 ), -chain, -datadir, -server, --help, Bitcoind logs, Bitcoind changelog