chore: dynamic hosts, builder targets

Make hosts read from directories, to limit manual changes
Rename vm-gitlab -> gitlab
A few reformatting and lint changes due to altered files
Create builder targets for Darwin builders

hosts/unstable/linode/nginx.nix

@@ -0,0 +1,44 @@
+{ ... }:
+let
+  homepage = "127.0.0.1:30080";
+in
+{
+  security.acme = {
+    acceptTerms = true;
+    defaults.email = "greg.hellings@gmail.com";
+  };
+
+  services.nginx = {
+    enable = true;
+
+    clientMaxBodySize = "25000m"; # To help with uploading container images
+    # If there are recommended settings, let's use them!
+    recommendedGzipSettings = true;
+    recommendedOptimisation = true;
+    recommendedProxySettings = true;
+    recommendedTlsSettings = true;
+  };
+
+  # Actually serve the content from here
+  virtualisation.podman.enable = true;
+  virtualisation.oci-containers = {
+    backend = "podman";
+    containers."homepage" = {
+      # needs explicit port to match what gitlab-runner sees when pulling
+      image = "registry.thehellings.com:443/greg/homepage/gregs-homepage:latest";
+      ports = [ "${homepage}:80" ];
+    };
+  };
+  greg.proxies = {
+    "thehellings.com" = {
+      target = "http://${homepage}/";
+      ssl = true;
+      genAliases = false;
+    };
+    "doubles.thehellings.com" = {
+      target = "http://localhost:8081";
+      ssl = true;
+      genAliases = false;
+    };
+  };
+}