Update postgresql roadmap

src/components/OpenSourceBanner.astro

@@ -30,12 +30,12 @@ const starCount = await getFormattedStars('kamranahmedse/developer-roadmap');
       </a>
 
       <a
-        href='https://discord.gg/cJpEt5Qbwa'
+        href="https://discord.gg/cJpEt5Qbwa"
         target='_blank'
         class='relative pointer inline-flex items-center border border-black py-1.5 px-3 rounded-lg text-sm hover:text-white hover:bg-black bg-white group'
       >
         <Icon icon='discord' class='h-[14px] mr-2 -ml-1 fill-current' />
-        Join on Discord <span class="rounded-sm ml-0.5 px-1.5 py-0.5 text-xs uppercase">/ New</span>
+        Join on Discord
       </a>
     </div>
   </div>

src/data/roadmaps/mongodb/mongodb.md

@@ -41,6 +41,7 @@ seo:
     - 'mongodb quiz'
     - 'mongodb interview questions'
 relatedRoadmaps:
+  - 'postgresql-dba'
   - 'backend'
   - 'nodejs'
   - 'system-design'

src/data/roadmaps/postgresql-dba/postgresql-dba.md

@@ -2,7 +2,7 @@
 jsonUrl: '/jsons/roadmaps/postgresql-dba.json'
 pdfUrl: '/pdfs/roadmaps/postgresql-dba.pdf'
 order: 5
-briefTitle: 'DBA'
+briefTitle: 'PostgreSQL'
 briefDescription: 'Step by step guide to become a PostgreSQL DBA in 2023'
 title: 'PostgreSQL DBA'
 description: 'Step by step guide to becoming a modern PostgreSQL DB Administrator in 2023'
@@ -33,6 +33,7 @@ seo:
     - 'database administrator quiz'
     - 'dba interview questions'
 relatedRoadmaps:
+  - 'mongodb'
   - 'backend'
   - 'devops'
 sitemap:
@@ -251,4 +252,4 @@ Get involved to Postgres community and contribute to Postgres; be a useful membe
   - pgsql-hackers
   - pgsql-bugs
 - Reviewing patches
-- Writing patches, attending in [Commitfests](https://commitfest.postgresql.org/)
+- Writing patches, attending in [Commitfests](https://commitfest.postgresql.org/)

src/lib/discord.ts

@@ -0,0 +1,23 @@
+const formatter = Intl.NumberFormat('en-US', {
+  notation: 'compact',
+});
+
+export async function getDiscordInfo(): Promise<{
+  url: string;
+  total: number;
+  totalFormatted: string;
+  online: number;
+  onlineFormatted: string;
+}> {
+  const response = await fetch(
+    'https://discord.com/api/v9/invites/cJpEt5Qbwa?with_counts=true'
+  );
+  const json = await response.json();
+  return {
+    url: `https://discord.gg/${json.code}`,
+    total: json.approximate_member_count,
+    totalFormatted: formatter.format(json.approximate_member_count),
+    online: json.approximate_presence_count,
+    onlineFormatted: formatter.format(json.approximate_presence_count),
+  };
+}