set lastmod date of /notes to most recent post's

pages/projects.tsx

@@ -41,7 +41,7 @@ const GitHubLogo = styled(OctocatOcticon, {
   fill: "$text",
 });
 
-const Projects = ({ repos }) => {
+const Projects = ({ repos }: { repos: Repository[] }) => {
   return (
     <>
       <NextSeo
@@ -55,7 +55,7 @@ const Projects = ({ repos }) => {
 
       <Content>
         <Wrapper>
-          {repos.map((repo: Repository) => (
+          {repos.map((repo) => (
             <Card key={repo.name} {...repo} />
           ))}
         </Wrapper>

pages/sitemap.xml.ts

@@ -14,9 +14,8 @@ export const getServerSideProps: GetServerSideProps = async (context) => {
       url: "/",
       priority: 1.0,
       changefreq: EnumChangefreq.WEEKLY,
-      lastmod: RELEASE_DATE,
+      lastmod: RELEASE_DATE, // timestamp frozen when a new build is deployed
     },
-    { url: "/notes/", changefreq: EnumChangefreq.WEEKLY, lastmod: RELEASE_DATE },
     { url: "/birthday/" },
     { url: "/cli/" },
     { url: "/contact/" },
@@ -41,6 +40,15 @@ export const getServerSideProps: GetServerSideProps = async (context) => {
     })
   );
 
+  // set lastmod of /notes/ page to most recent post's date
+  pages.push({
+    url: "/notes/",
+    lastmod: new Date(notes[0].date).toISOString(),
+  });
+
+  // sort alphabetically by URL
+  pages.sort((a, b) => (a.url < b.url ? -1 : 1));
+
   // translate array of all pages to sitemap's stream
   pages.forEach((page) => {
     stream.write(page);