PSQLittle is a yet another RDBMS compatible with PostgreSQL. This is for me to study RDBMS.
git clone https://github.com/goropikari/psqlittle.git
cd psqlittle
docker build -t psqlittle .
docker run -it -p 15432:5432 psqlittle # server mode
psql -h 127.0.0.1 -p 15432 # connect dbms by using psql
docker run -it psqlittle repl # repl mode