Provided docker-compose.prysm.yml to start Prysm client

[mxmar]

In this PR I would like to introduce docker compose file to start Prysm client as a consensus layer software. Right now I can not say more, because it is in initial-sync phase still:

time="2021-12-30 12:25:36" level=info msg="Finished applying state transition" attestations=17 prefix=blockchain slot=19896
time="2021-12-30 12:25:36" level=info msg="Synced new block" blockRoot=0x564a4d21... epoch=621 finalizedEpoch=619 finalizedRoot=0xb51b5a68... parentRoot=0x564a4d21... prefix=blockchain slot=19897 slotInEpoch=25 version=merge
time="2021-12-30 12:25:36" level=info msg="Finished applying state transition" attestations=20 prefix=blockchain slot=19897
time="2021-12-30 12:25:36" level=info msg="Synced new block" blockRoot=0xf3bd135d... epoch=621 finalizedEpoch=619 finalizedRoot=0xb51b5a68... parentRoot=0xf3bd135d... prefix=blockchain slot=19898 slotInEpoch=26 version=merge
time="2021-12-30 12:25:36" level=info msg="Finished applying state transition" attestations=17 prefix=blockchain slot=19898
time="2021-12-30 12:25:36" level=info msg="Synced new block" blockRoot=0x18d873a1... epoch=621 finalizedEpoch=619 finalizedRoot=0xb51b5a68... parentRoot=0x18d873a1... prefix=blockchain slot=19900 slotInEpoch=28 version=merge
time="2021-12-30 12:25:36" level=info msg="Finished applying state transition" attestations=34 prefix=blockchain slot=19900
time="2021-12-30 12:25:36" level=info msg="Synced new block" blockRoot=0x1f38319e... epoch=621 finalizedEpoch=619 finalizedRoot=0xb51b5a68... parentRoot=0x1f38319e... prefix=blockchain slot=19901 slotInEpoch=29 version=merge
time="2021-12-30 12:25:36" level=info msg="Finished applying state transition" attestations=19 prefix=blockchain slot=19901
time="2021-12-30 12:25:36" level=info msg="Synced new block" blockRoot=0x94b1f421... epoch=621 finalizedEpoch=619 finalizedRoot=0xb51b5a68... parentRoot=0x94b1f421... prefix=blockchain slot=19902 slotInEpoch=30 version=merge
time="2021-12-30 12:25:36" level=info msg="Finished applying state transition" attestations=17 prefix=blockchain slot=19902
time="2021-12-30 12:25:36" level=info msg="Synced new block" blockRoot=0x248f272d... epoch=621 finalizedEpoch=619 finalizedRoot=0xb51b5a68... parentRoot=0x248f272d... prefix=blockchain slot=19903 slotInEpoch=31 version=merge
time="2021-12-30 12:25:36" level=info msg="Finished applying state transition" attestations=25 prefix=blockchain slot=19903
time="2021-12-30 12:25:36" level=info msg="Processing block batch of size 61 starting from  0xb9a26aa0... 19904/100603 - estimated time remaining 1h13m54s" blocksPerSecond=18.2 peers=45 prefix=initial-sync