https://computingforgeeks.com/how-to-install-pgadmin4-on-debian/
apt install gnupg gnupg2
echo "deb https://ftp.postgresql.org/pub/pgadmin/pgadmin4/apt/$(lsb_release -cs) pgadmin4 main" | sudo tee /etc/apt/sources.list.d/pgadmin4.list
cat /etc/apt/sources.list.d/pgadmin4.list
curl https://www.pgadmin.org/static/packages_pgadmin_org.pub | sudo apt-key add

su - postgres
psql
# DROP DATABASE djadmindb;
CREATE USER djadmin WITH PASSWORD '***************************' CREATEDB;
CREATE DATABASE djadmindb WITH OWNER djadmin;
ALTER ROLE djadmin SET client_encoding TO 'utf8';
ALTER ROLE djadmin SET default_transaction_isolation TO 'read committed';
ALTER ROLE djadmin SET timezone TO 'UTC';
GRANT ALL PRIVILEGES ON DATABASE djadmindb TO djadmin;
GRANT ALL PRIVILEGES ON ALL TABLES IN SCHEMA public TO djadmin;
GRANT USAGE, SELECT ON ALL SEQUENCES IN SCHEMA public TO djadmin;
grant postgres to djadmin
\q

psql "postgres://djadmin@192.168.1.6/djadmindb"

sudo apt update
apt install pgadmin4-web
/usr/pgadmin4/bin/setup-web.sh
sudo ufw allow http
sudo ufw allow https

sudo adduser MYUSERNAME
sudo usermod -aG sudo MYUSERNAME
su - MYUSERNAME
sudo usermod -a -G www-data $USER
sudo apt remove curl