[postgres] make init scripts idempotent #8
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This allows to attach a persistent volume to the PostgreSQL service and still always run the init scripts on startup. For the first startup with a fresh volume, the database will be initialized correctly; on subsequent starts the init scripts will do nothing.
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This allows to attach a persistent volume to the PostgreSQL service and still always run the init scripts on startup. For the first startup with a fresh volume, the database will be initialized correctly; on subsequent starts the init scripts will do nothing.