docker: simplify README.md (#4521)
docker: simplify README.md (#4521)


fujicoin/electrum-fjc,pooler/electrum-ltc,fujicoin/electrum-fjc,cryptapus/electrum,fujicoin/electrum-fjc,vialectrum/vialectrum,spesmilo/electrum,asfin/electrum,neocogent/electrum,neocogent/electrum,neocogent/electrum,pooler/electrum-ltc,spesmilo/electrum,cryptapus/electrum,wakiyamap/electrum-mona,vialectrum/vialectrum,pooler/electrum-ltc,wakiyamap/electrum-mona,spesmilo/electrum,wakiyamap/electrum-mona,asfin/electrum,pooler/electrum-ltc,asfin/electrum,cryptapus/electrum,vialectrum/vialectrum,spesmilo/electrum,wakiyamap/electrum-mona