Improve SEO

[bogas04]

In order to gain good traffic, we need to up our SEO game.

• [x] Before SEO, we need to add good GA insights to observe traffic.
• [ ] Whatever #318 is saying.
• [x] Basic meta description, this is to make us discoverable for "search gurbani" sort of queries. #317
• [ ] Search results for famous shabads should hit STTM. "lakh khushiya paatshahiya" should hit SSTM. We need to maintain a list of these shabads.
• [ ] Shabad pages should also match search queries.
• [ ] Rich snippets for shabad lyrics. "lyrics of mera mujh mai kuch nahi" should hit STTM.

Currently we are blocked by #329.