gerd.element: inital add of element chat

Skamløst hugget fra min egen config (bare uden Jitsi, for det har
fricloud ikke. rend.al > fricloud.dk)

machines/gerd.nix

@@ -20,6 +20,7 @@
     ./gerd/services/nextcloud.nix
     ./gerd/services/stalwart
 
+    ./gerd/services/element.nix
     ./gerd/services/matrix-synapse.nix
   ];
 

machines/gerd/services/element.nix

@@ -0,0 +1,36 @@
+{ config, pkgs, ... }:
+
+let
+  svc_domain = "chat.${config.mine.shared.settings.domain}";
+
+  # configure element web client 
+  pkg_element = pkgs.element-web.override {
+    conf = {
+      default_theme = "dark";
+      features.feature_latex_maths = true;
+      disable_guests = true;
+
+      default_server_name = config.mine.shared.settings.domain;
+    };
+  };
+in {
+  services.nginx.virtualHosts."${svc_domain}" = {
+    forceSSL = true;
+    enableACME = true;
+    locations."/".root = pkg_element;
+  };
+
+  mine.shared.meta.element = {
+    name = "Element";
+    description = "We host our own Element instance, get on it and start chatting!";
+    url = "https://${svc_domain}";
+
+    package = let
+      pkg = pkg_element;
+    in {
+      name = pkg.pname;
+      version = pkg.version;
+      meta = pkg.meta;
+    };
+  };
+}

machines/gerd/services/matrix-synapse.nix

@@ -182,6 +182,8 @@ in {
     matrix-synapse-config-authelia-secret.owner = matrix_synapse_user;
   };
 
+  mine.shared.settings.matrix-synapse.domain = svc_domain;
+
   mine.shared.meta.matrix-synapse = {
     name = "Matrix Synapse";
     description = "We host our own Matrix homeserver using Synapse! Login using your favourite which supports OpenID.";