feat: feed feature, typescript, remove google, fix errs & warns

src/templates/blog-post.tsx

@@ -1,5 +1,5 @@
-import React from 'react'
-import { Link, graphql } from 'gatsby'
+import * as React from 'react'
+import { graphql, PageProps } from 'gatsby'
 
 import Layout from '../components/layout'
 import Seo from '../components/seo'
@@ -8,15 +8,19 @@ import { Section } from '../components/shared'
 import Post from './post'
 import { SideBar } from './sidebar'
 
-const BlogPostTemplate = ({ data, location, pageContext }) => {
+import type { PostNode, PageContext } from '../types'
+
+const BlogPostTemplate: React.FC<
+  PageProps<{ post: PostNode }, PageContext>
+> = ({ data, location, pageContext }) => {
   const { post } = data
   const { previewImg } = post.frontmatter
 
   return (
     <Layout location={location} heroSection={false}>
       <Seo
-        title={post?.frontmatter?.title}
-        description={post?.frontmatter?.description}
+        title={post.frontmatter.title}
+        description={post.frontmatter.description}
         previewImg={
           previewImg?.childImageSharp?.gatsbyImageData?.images?.fallback?.src
         }