Use AAI-proxy at LBR

Currently there is a static page privacy-policy.html, which is copied to /var/www/html so that it is accessible to outside validation via wget, and also privacy-policy-[en|fi].md, which is shown to the user in the UI. This causes the potential problem of the two pages having different content.

Some options to solve this:

- Generate privacy-policy.html from the md file during deployment
- Link to privacy-policy.html page from the UI instead of showing the content of the MD files (this has the drawback of linking away from the actual rems site)

Also make privacy-policy.html page more visually similar to the REMS site if it will be actually shown to the user.