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# inside Dockerfile
COPY your_sql_file.sql /docker-entrypoint-initdb.d/
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$ docker exec -it my_postgres psql -U postgres -c "create database my_database"
c
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sudo docker run --name my-postgres-container -e POSTGRES_PASSWORD=postgres -p 5432:5432 -d postgres
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docker run --name postgres-db -e POSTGRES_PASSWORD=docker -p 5432:5432 -d postgres