feat: blog subscribe

[johnathonroach]

Fixes #1597 This PR adds a subscribe endpoint using mailchimp.

[johnathonroach]

@JeffLowe Before deployment, we need to generate and update the Web3 environment with three new env vars for the Mailchimp subscription functionality.

Updated 080/26/2022 - since we already have a var named MAILCHIMP_API_KEY that is used for other things, I have updated the name for the blog subscribe list as it has its own API key.

We will need just the MAILCHIMP_BLOG_API_KEY added to secrets

[github-actions[bot]]

package-lock.json changes

Click to toggle table visibility

Name	Status	Previous	Current
fetch-blob		-	3.2.0
formdata-polyfill		-	4.0.10
node-domexception		-	1.0.0
node-fetch		2.6.7	3.2.10

[github-actions[bot]]

Website preview 🔗✨

• 🙂 https://w3s.link/ipfs/bafybeia57t66mtnohko5payvyzxuine4lphlmbg5vcnmvjo5erzqmevvq4
• ⛅️ https://d8e19b07.web3-storage-staging.pages.dev

build log