Hi,
I'm bulding an Approval process, for that I'm preparing an email (Text) template to include VisualForce page link so that approvars opens that page and submit. I can get the Salesforce Base URL from apex but I have no clue how to get it form email template.
See the following template that I have gotten from APEX.

<a href='https://'+ System.URL.getSalesforceBaseUrl().getHost() +  
             '/apex/GUGocardPhotoApprovalPage?ContactId='+contactID'>Click here </a>