MySQL : Sequelize cannot sync to MySQL in a docker container from Node/express app (ECONNREFUSED)

MySQL : Sequelize cannot sync to MySQL in a docker container from Node/express app (ECONNREFUSED)
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MySQL : Sequelize cannot sync to MySQL in a docker container from Node/express app (ECONNREFUSED)
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Sequelize docker Node/express container app sync cannot MySQL in (ECONNREFUSED) MySQL to a : from