app/views/onboarding_mailer/onboarding_email_content.html.erb
<h1 class="mb-3"><%= t('onboarding_mailer.onboarding_email.title') %></h1>
<p>
<%= t('onboarding_mailer.onboarding_email.paragraph_1_html', school_name: @school_onboarding.school_name) %>
</p>
<div class="s-3"></div>
<p>
<%= t('onboarding_mailer.onboarding_email.paragraph_2') %>
</p>
<div class="s-3"></div>
<p>
<%= t('onboarding_mailer.onboarding_email.paragraph_3') %>
<p>
<%= link_to t('onboarding_mailer.onboarding_email.set_up_your_school_on_energy_sparks'), onboarding_url(@school_onboarding), class: 'btn btn-primary mb-3 mt-3'%>
<p class="small"><%= t('onboarding_mailer.onboarding_email.the_energy_sparks_team') %><p>