Add linting, formatting, and CI infrastructure

- Add deadnix, nixfmt, and statix to flake inputs
- Add formatter output to flake for nix fmt support
- Add deadnix, nixfmt, statix to Home Manager packages
- Add GitHub Actions workflow for CI validation
- Add .pre-commit-config.yaml with hooks for nixfmt, deadnix, and statix
- Support x86_64-darwin in formatter

modules/hosts/nixos/hetznix02/post-install/default.nix

@@ -1,4 +1,5 @@
-{ config, username, ... }: {
+{ config, username, ... }:
+{
   imports = [
     ../../../../shared/nixos/lets-encrypt.nix
     ./monitoring.nix
@@ -23,4 +24,3 @@
     };
   };
 }
-

modules/hosts/nixos/hetznix02/post-install/monitoring.nix

@@ -1,6 +1,8 @@
-{ config, pkgs, ... }: let
+{ config, pkgs, ... }:
+let
   metrics_server = "https://monitoring.home.technicalissues.us/remotewrite";
-in {
+in
+{
   services = {
     vmagent = {
       enable = true;
@@ -14,11 +16,11 @@ in {
           {
             job_name = "node";
             static_configs = [
-              { targets = ["127.0.0.1:9100"]; }
+              { targets = [ "127.0.0.1:9100" ]; }
             ];
             metric_relabel_configs = [
               {
-                source_labels = ["__name__"];
+                source_labels = [ "__name__" ];
                 regex = "go_.*";
                 action = "drop";
               }
@@ -35,11 +37,11 @@ in {
           {
             job_name = "nginx";
             static_configs = [
-              { targets = ["127.0.0.1:9113"]; }
+              { targets = [ "127.0.0.1:9113" ]; }
             ];
             metric_relabel_configs = [
               {
-                source_labels = ["__name__"];
+                source_labels = [ "__name__" ];
                 regex = "go_.*";
                 action = "drop";
               }
@@ -77,7 +79,7 @@ in {
     # ----------------------------
     # Exporters (using built-in NixOS modules)
     # ----------------------------
-    
+
     # Node exporter - using the built-in module
     prometheus.exporters.node = {
       enable = true;
@@ -110,7 +112,7 @@ in {
     group = "vmagent";
   };
 
-  users.groups.vmagent = {};
+  users.groups.vmagent = { };
 
   # ----------------------------
   # SOPS secrets configuration
@@ -119,10 +121,9 @@ in {
     secrets = {
       vmagent_push_pw = {
         owner = "vmagent";
-        restartUnits = ["vmagent.service"];
+        restartUnits = [ "vmagent.service" ];
         sopsFile = ../../../../shared/secrets.yaml;
       };
     };
   };
 }
-

modules/hosts/nixos/hetznix02/post-install/nginx.nix

@@ -1,7 +1,8 @@
-
-{ pkgs, ... }: let
+{ pkgs, ... }:
+let
   domain = "genebean.me";
-in {
+in
+{
   environment.etc.nginx-littlelinks = {
     # Info generated via
     # nurl https://github.com/genebean/littlelink genebean-sometag