How add ext-exif module in php.ini config?

Not found instruction how add php modules in Dockerfile, in my Dockerfile i have:

```
FROM richarvey/nginx-php-fpm:3.1.6

COPY --from=composer:latest /usr/bin/composer /usr/local/bin/composer

COPY . .
```

I think i somewhere must write:

/usr/local/bin/docker-php-ext-configure exif
/usr/local/bin/docker-php-ext-install exif

But dont know where..