refactor: Use haumea for filesystem-based module system for flake outputs

refactor: Use hyphen(`-`) for variable names & folder names(except Python), replace all unserscore(`_`) with hyphen(`-`).

hosts/idols-ruby/caddy.nix

@@ -0,0 +1,40 @@
+{myvars, ...}: {
+  services.caddy = {
+    enable = true;
+    # Reload Caddy instead of restarting it when configuration file changes.
+    enableReload = true;
+    user = "caddy"; # User account under which caddy runs.
+    dataDir = "/var/lib/caddy";
+    logDir = "/var/log/caddy";
+
+    # Additional lines of configuration appended to the global config section of the Caddyfile.
+    # Refer to https://caddyserver.com/docs/caddyfile/options#global-options for details on supported values.
+    globalConfig = ''
+      http_port    80
+      https_port   443
+      auto_https   off
+    '';
+
+    # ACME related settings.
+    # email = myvars.useremail;
+    # acmeCA = "https://acme-v02.api.letsencrypt.org/directory";
+
+    virtualHosts."http://grafana.writefor.fun".extraConfig = ''
+      encode zstd gzip
+      reverse_proxy http://localhost:3000
+    '';
+    virtualHosts."http://prometheus.writefor.fun".extraConfig = ''
+      encode zstd gzip
+      reverse_proxy http://localhost:9090
+    '';
+    virtualHosts."http://alertmanager.writefor.fun".extraConfig = ''
+      encode zstd gzip
+      reverse_proxy http://localhost:9093
+    '';
+    virtualHosts."http://attic.writefor.fun".extraConfig = ''
+      encode zstd gzip
+      reverse_proxy http://localhost:8888
+    '';
+  };
+  networking.firewall.allowedTCPPorts = [80 443];
+}