Add declarative ssh known hosts

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

hosts/installer/default.nix

@@ -1,8 +1,6 @@
 { config, inputs, ... }:
 {
   imports = [
-    ../../lib
-
     inputs.disko.nixosModules.disko
     ./format.nix
 

hosts/installer/users/nick/configs/console/git/default.nix

@@ -2,7 +2,15 @@
   user ? throw "user argument is required",
   home ? throw "home argument is required",
 }:
-{ ... }:
+{
+  inputs,
+  lib,
+  system,
+  ...
+}:
+let
+  selfPkgs = inputs.self.packages.${system};
+in
 {
   home-manager.users.${user} = {
     sops.secrets = {
@@ -17,12 +25,16 @@
       };
     };
 
-    programs.ssh.matchBlocks = {
-      "github.com" = {
-        hostname = "github.com";
-        user = "git";
-        identityFile = "${home}/.ssh/ssh_personal_ed25519_key";
+    programs.ssh = {
+      matchBlocks = {
+        "github.com" = {
+          hostname = "github.com";
+          user = "git";
+          identityFile = "${home}/.ssh/ssh_personal_ed25519_key";
+        };
       };
+
+      userKnownHostsFiles = with selfPkgs; [ ssh-known-hosts-github ];
     };
   };
 }