feat(tazjin/nixos): deploy monica on koptevo

Change-Id: Iaa74d995f3b2556673095a32ec2b718dcb2d82a4
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8849
Tested-by: BuildkiteCI
Reviewed-by: tazjin <tazjin@tvl.su>

users/tazjin/nixos/modules/monica.nix

@@ -0,0 +1,26 @@
+# Host the Monica personal CRM software.
+{ depot, config, ... }:
+
+{
+  imports = [
+    (depot.third_party.agenix.src + "/modules/age.nix")
+  ];
+
+  age.secrets.monica-appkey = {
+    group = config.services.monica.group;
+    file = depot.users.tazjin.secrets."monica-appkey.age";
+    mode = "0440";
+  };
+
+  services.monica = {
+    enable = true;
+    hostname = "monica.tazj.in";
+    appKeyFile = "/run/agenix/monica-appkey";
+    database.createLocally = true;
+
+    nginx = {
+      enableACME = true;
+      forceSSL = true;
+    };
+  };
+}