Add AdGuard Home (#1315)

docs/assets/img/browsers/adguard.svg

@@ -1,2 +1 @@
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docs/assets/img/dns/adguard-home.svg

@@ -0,0 +1 @@
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docs/dns.en.md

@@ -132,6 +132,23 @@ Encrypted DNS proxy software provides a local proxy for the [unencrypted DNS](ba
 
 ## Self-hosted Solutions
 
+A self-hosted DNS solution is useful for providing filtering on controlled platforms, such as Smart TVs and other IOT devices, as no client-side software is needed.
+
+### AdGuard Home
+
+!!! recommendation
+
+    ![AdGuard Home logo](assets/img/dns/adguard-home.svg){ align=right }
+
+    **AdGuard Home** is an open source [DNS-sinkhole](https://wikipedia.org/wiki/DNS_sinkhole) which uses [DNS filtering](https://www.cloudflare.com/learning/access-management/what-is-dns-filtering/) to block unwanted web content, such as advertisements.
+
+    AdGuard Home features a polished web interface to view insights and manage blocked content.
+
+    [:octicons-home-16: Homepage](https://adguard.com/adguard-home/overview.html){ .md-button .md-button--primary }
+    [:octicons-eye-16:](https://adguard.com/privacy/home.html){ .card-link title="Privacy Policy" }
+    [:octicons-info-16:](https://github.com/AdguardTeam/AdGuardHome/wiki){ .card-link title=Documentation}
+    [:octicons-code-16:](https://github.com/AdguardTeam/AdGuardHome){ .card-link title="Source Code" }
+
 ### Pi-hole
 
 !!! recommendation

docs/tools.en.md

@@ -140,6 +140,7 @@ We [recommend](dns.md#recommended-providers) a number of encrypted DNS servers b
 
 <div class="grid cards" markdown>
 
+- ![AdGuard Home logo](assets/img/dns/adguard-home.svg){ .twemoji } [AdGuard Home](dns.md#adguard-home)
 - ![Pi-hole logo](assets/img/dns/pi-hole.svg){ .twemoji } [Pi-hole](dns.md#pi-hole)
 
 </div>