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@@ -55,7 +55,9 @@ The PostgreSQL image uses several environment variables which are easy to miss.
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This environment variable is recommended for you to use the PostgreSQL image. This environment variable sets the superuser password for PostgreSQL. The default superuser is defined by the `POSTGRES_USER` environment variable. In the above example, it is being set to "mysecretpassword".
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-Note: The PostgreSQL image sets up `trust` authentication locally so you may notice a password is not required when connecting from `localhost` (inside the same container). However, a password will be required if connecting from a different host/container.
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+Note 1: The PostgreSQL image sets up `trust` authentication locally so you may notice a password is not required when connecting from `localhost` (inside the same container). However, a password will be required if connecting from a different host/container.
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+Note 2: This variable defines the superuser password in the PostgreSQL instance, as set by the `initdb` script during inital container startup. It has no effect on the `PGPASSWORD` environment variable that may be used by the `psql` client at runtime, as described at [https://www.postgresql.org/docs/10/static/libpq-envars.html](https://www.postgresql.org/docs/10/static/libpq-envars.html). `PGPASSWORD`, if used, will be specified as a separate environment variable.
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### `POSTGRES_USER`
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