Skip whatever you already have. If you're a beginner, you might want to follow https://github.com/greenbigfrog/dogecoin-bootstrap/wiki/Set-up-node-on-a-VPS instead. Docker makes only sense to use, if you're already using docker.
Install docker: https://docs.docker.com/engine/install/debian/#install-using-the-repository
wget https://github.com/greenbigfrog/dogecoin-bootstrap/releases/download/v2021.01.29/dogecoin-bootstrap-2021-01-29.torrent
apt install aria2
aria2c --check-integrity=true --bt-max-peers=0 --seed-ratio=0 dogecoin-bootstrap-2021-01-29.torrent
ln -s dogecoin-bootstrap-2021-01-29 .dogecoin
echo "rpcuser=jdgjg
rpcpassword=dgskgdsk" >> ~/.dogecoin/dogecoin.conf
chown -R 1000:1000 ~/.dogecoin
docker run -ti --mount type=bind,source="$PWD"/.dogecoin/,target=/dogecoin/.dogecoin -p 22556:22556 greenbigfrog/dogecoin:1.14.2 dogecoind -printtoconsole
I believe this
chmod -R 1000:1000 ~/.dogecoin
should bechown -R 1000:1000 ~/.dogecoin
.