howto

The "!" is shown in the section below:

`When Boolean is called with argument value, the following steps are taken:

Let b be ! ToBoolean(value).

If NewTarget is undefined, return b.

Let O be ? OrdinaryCreateFromConstructor(NewTarget, "%BooleanPrototype%", « [[BooleanData]] »).

Set O.[[BooleanData]] to b.

Return O.`

The finished project does not work on my machine (Debian 10). After entering mix phx.server I was prompted to install rebar3, which I did. Entering mix phx.server gets me this error:

function :crypto.hmac/3 is undefined or private 

Found through review of dwyl/phoenix-ecto-append-only-log-example#11

Link currently points to https://github.com/dwyl/phoenix-ecto-append-only-log-example/pull/2/files#diff-db55bfd345510f8bbb29d36daadf7061R21, which at the time was part of a PR.

Should we now update this to https://github.com/dwyl/phoenix-ecto-append-only-log-example/blob/3eb130e103cef05ef57e5d1fcd2