start refactoring shared code into modules, update the lock, do some other minor fixes

modules/nixos/shared-packages/server-settings/cinny/default.nix

@@ -0,0 +1,17 @@
+{pkgs, ...}: {
+  services.nginx = {
+    enable = true;
+    virtualHosts = {
+      "cinny.gladtherescake.eu" = {
+        root = "${pkgs.cinny}";
+        ## Force HTTP redirect to HTTPS
+        forceSSL = true;
+        ## LetsEncrypt
+        enableACME = true;
+        locations."/" = {
+          index = "index.html";
+        };
+      };
+    };
+  };
+}