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Got this error when setting up database with docker-compose

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#1

Following lesson on docker for rails dev, got below error on postgres lesson

PG::ConnectionBad: could not connect to server: No such file or directory
Is the server running locally and accepting
connections on Unix domain socket “/var/run/postgresql/.s.PGSQL.5432”?

#2

In the same terminal, use the following code :
docker-compose exec web bin/rails db:migrate

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