Add modules/server/containers/apps/robotstxt.nix

modules/server/containers/apps/robotstxt.nix

@@ -0,0 +1,52 @@
+{ containerCfg, pkgs, builder, name, ... }:
+let
+  port = 8080;
+  priority = toString (containerCfg.extra.priority or 2147482647);
+  defaultRobots = ''
+    User-agent: *
+    Disallow: /
+  '';
+  robots =
+    if containerCfg.extra ? robots then
+      containerCfg.extra.robots
+    else
+      defaultRobots + (containerCfg.extra.extraRobots or "");
+  robotsRoot = pkgs.writeTextDir "robots.txt" robots;
+  image = pkgs.dockerTools.streamLayeredImage {
+    name = "robots";
+    tag = "1";
+    contents = [
+      robotsRoot
+      pkgs.busybox
+    ];
+    config = {
+      Entrypoint = [
+        "${pkgs.busybox}/bin/httpd"
+        "-f"
+        "-p"
+        "0.0.0.0:${toString port}"
+        "-h"
+        "${robotsRoot}"
+      ];
+      ExposedPorts = { "${toString port}/tcp" = { }; };
+      WorkingDir = "/";
+    };
+  };
+in {
+  runtime = {
+    containers = {
+      server = builder.mkContainer {
+        imageStream = image;
+        port = port;
+        extraLabels = {
+          "traefik.enable" = "true";
+          "traefik.http.routers.${name}.entrypoints" = "web-secure";
+          "traefik.http.routers.${name}.rule" = "Path(`/robots.txt`)";
+          "traefik.http.routers.${name}.priority" = priority;
+          "traefik.http.routers.${name}.tls" = "true";
+          "traefik.http.services.${name}.loadbalancer.server.port" = toString port;
+        };
+      };
+    };
+  };
+}