serve nexus flatpak repo

clients/quadraticserver/nexus/default.nix

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+{ pkgs, ... }: {
+  services.caddy.virtualHosts."nexus.federated.nexus".extraConfig = ''
+    handle_path /flatpak/* {
+      @meta path /nexus.flatpakref /nexus.flatpakrepo
+      handle @meta {
+        root * ${
+          pkgs.linkFarm "nexus-flatpak-meta" {
+            "nexus.flatpakref" = ./nexus.flatpakref;
+            "nexus.flatpakrepo" = ./nexus.flatpakrepo;
+          }
+        }
+        file_server
+      }
+
+      handle {
+        rewrite * /nexus{path}
+
+        reverse_proxy https://henry-hiles.github.io {
+          header_up Host {upstream_hostport}
+        }
+      }
+
+      @immutable path /objects/* /deltas/*
+      header @immutable >Cache-Control "public, max-age=31536000, immutable"
+
+      @mutable path /summary /summary.sig /refs/* /appstream/*
+      header @mutable >Cache-Control "no-cache"
+    }
+
+    handle {
+      redir https://git.federated.nexus/Nexus/nexus{uri} permanent
+    }
+  '';
+}

clients/quadraticserver/nexus/nexus.flatpakref

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+[Flatpak Ref]
+Title=Nexus
+Name=nexus.federated.nexus
+Branch=stable
+Url=https://nexus.federated.nexus/flatpak/
+SuggestRemoteName=nexus
+IsRuntime=false
+RuntimeRepo=https://dl.flathub.org/repo/flathub.flatpakrepo

clients/quadraticserver/nexus/nexus.flatpakrepo

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+[Flatpak Repo]
+Title=Nexus
+Url=https://nexus.federated.nexus/flatpak/