chore(hackclub.community): update DNS records for @hackclub-alumni (#2321)

* chore(hackclub.community): update DNS records for @hackclub-alumni

This involves setting up records for Uberspace 8 Beta mailbox for alums,
as well as swapping GitHub Pages for GitLab Pages on GitLab SaaS.

Signed-off-by: Andrei Jiroh Halili <ajhalili2006@andreijiroh.dev>

* chore(hackclub.community): fix typo on MX record for @hackclub-alumni

Signed-off-by: Andrei Jiroh Halili <ajhalili2006@andreijiroh.dev>

* chore(hackclub.community): add @ajhalili2006's contact details for @hackclub-alumni

Currently, I am the primary PoC/maintainer for Alumni Society-related projects
and infra. As requested by @alx-alexpark, I added them across all the records,
alongside adding my contact page for alternative contact methods alongside
Slack and email.

Signed-off-by: Andrei Jiroh Halili <ajhalili2006@andreijiroh.dev>
On-behalf-of: @hackclub-alumni <society@alumni.hackclub.community>

---------

Signed-off-by: Andrei Jiroh Halili <ajhalili2006@andreijiroh.dev>

hackclub.community.yaml

@@ -7,45 +7,81 @@ _vercel:
 # Alumni Society (https://github.com/hackclub-alumni/meta/issues/1)
 # Records are primarily managed by @ajhalili2006 (U07CAPBB9B5), although other alums
 # can manage them by coordinating at #alums channel or https://github.com/hackclub-alumni/meta.
-alumni: 
+alumni: # ajhalili2006@andreijiroh.dev U07CAPBB9B5 https://andreijiroh.dev/contact
+  # GitLab Pages - https://gitlab.com/hackclub-community/alumni/website
   - ttl: 600
-    type: CNAME
-    value: hackclub-alumni.github.io.
-_atproto.alumni:
+    type: A
+    value: 35.185.44.232
+  - ttl: 600
+    type: AAAA
+    value: "2600:1901:0:7b8a::"
+  # Community mailbox for alums, currently managed by @ajhalili2006 on Uberspace [NOT PLANNED FOR SSO STUFF]
+  # If you are an alum, you can request one via Slack DMs or at https://gitlab.com/hackclub-community/alumni/meta/-/issues.
+  - octodns:
+      cloudflare:
+        comment: "U8 mailbox - ajhalili@janus.uberspace.de"
+    ttl: 600
+    type: MX
+    values:
+    - exchange: in-mx.uberspace.de.
+      preference: 10
+  - octodns:
+      cloudflare:
+        comment: "U8 mailbox - ajhalili@janus.uberspace.de"
+    ttl: 600
+    type: TXT
+    values:
+    - "uberspace-mail-gyCEpx0wY8" # verification challenge
+    - "v=spf1 include:spf.uberspace.de ~all" # SPF records
+_atproto.alumni: # ajhalili2006@andreijiroh.dev U07CAPBB9B5 https://andreijiroh.dev/contact
   - ttl: 600
     type: TXT
     value: "did=did:plc:yi5ewii4xerodl6ljn3fwga6"
 # GitHub organization domain verificiation
-_gh-hackclub-alumni-o.alumni:
+_gh-hackclub-alumni-o.alumni: # ajhalili2006@andreijiroh.dev U07CAPBB9B5 https://andreijiroh.dev/contact
   - ttl: 600
     type: TXT
     value: "d066f40ce3"
 # GH Pages domain verification to prevent domain takeovers if we do
 # wildcard CNAME records at *.alumni.hackclub.community
-_github-pages-challenge-hackclub-alumni.alumni:
+_github-pages-challenge-hackclub-alumni.alumni: # ajhalili2006@andreijiroh.dev U07CAPBB9B5 https://andreijiroh.dev/contact
   - ttl: 600
     type: TXT
     value: "62688903c020be82f48ace03d54467"
-blog.alumni:
+blog.alumni: # ajhalili2006@andreijiroh.dev U07CAPBB9B5 https://andreijiroh.dev/contact
   - ttl: 600
     type: CNAME
     value: 731fb7077db63b1d.vercel-dns-016.com.
+uberspace1._domainkey.alumni: # ajhalili2006@andreijiroh.dev U07CAPBB9B5 https://andreijiroh.dev/contact
+  - octodns:
+      cloudflare:
+        comment: "U8 mailbox - ajhalili@janus.uberspace.de"
+    ttl: 600
+    type: CNAME
+    value: dkim1.uberspace.de.
+uberspace2._domainkey.alumni: # ajhalili2006@andreijiroh.dev U07CAPBB9B5 https://andreijiroh.dev/contact
+  - octodns:
+      cloudflare:
+        comment: "U8 mailbox - ajhalili@janus.uberspace.de"
+    ttl: 600
+    type: CNAME
+    value: dkim2.uberspace.de.
 # GitLab Pages-hosted redirect to https://social.dino.icu/@alumni, also serves as custom handle
 # for AT Proto bridged profile (managed by Bridgy Fed).
-fediverse.alumni:
+fediverse.alumni: # ajhalili2006@andreijiroh.dev U07CAPBB9B5 https://andreijiroh.dev/contact
   - ttl: 600
     type: CNAME
     value: hackclub-community.gitlab.io.
 # Custom AT Proto handle for bridged fediverse profile (technically we could go with
 # @alumni.social.dino.icu to match the Hackstodon side
-_atproto.fediverse.alumni:
+_atproto.fediverse.alumni: # ajhalili2006@andreijiroh.dev U07CAPBB9B5 https://andreijiroh.dev/contact
   - ttl: 600
     type: TXT
     value: "did=did:plc:pejmcpkvnajr4x3htexetbzc"
 # GitLab Pages verification challenge record (note that GitLab Pages uses Let's Encrypt over
 # HTTP-01 challenge method for TLS cert issuance).
 # Docs: https://gitlab.com/help/user/project/pages/custom_domains_ssl_tls_certification/_index.md#4-verify-the-domains-ownership
-_gitlab-pages-verification-code.fediverse.alumni:
+_gitlab-pages-verification-code.fediverse.alumni: # ajhalili2006@andreijiroh.dev U07CAPBB9B5 https://andreijiroh.dev/contact
   - ttl: 600
     type: TXT 
     value: "gitlab-pages-verification-code=6d5351c9c8ce7bc19be0bda5bdd4c4c5"