[Nix] Adds MCP config.

system/hosts/mcp/containers/lib.nix

@@ -0,0 +1,30 @@
+config:
+let
+  hostRule = host: "Host(`${host}.${config.domainName}`)";
+  localNetRule = "ClientIP(`${config.localNet}`)";
+  localHostRule = host: "${localNetRule} && ${hostRule host}";
+in 
+{
+  inherit hostRule localNetRule localHostRule;
+
+  mkContainer = { image, dependsOn ? [], hostName, port, volumes ? [], environment ? [], homepageOpts, public ? false}:
+    let routerRule = if public then hostRule hostName else localHostRule hostName;
+    in
+    {
+      image = image;
+      autoStart = true;
+      dependsOn = dependsOn;
+      extraOptions = [
+        "-l=traefik.enable=true"
+        "-l=traefik.http.routers.${hostName}.rule=${routerRule}"
+        "-l=traefik.http.services.${hostName}.loadbalancer.server.port=${toString port}"
+        "-l=homepage.group=${homepageOpts.group}"
+        "-l=homepage.name=${homepageOpts.name}"
+        "-l=homepage.icon=${homepageOpts.icon}"
+        "-l=homepage.href=https://${hostName}.${config.domainName}"
+        "-l=homepage.description=${homepageOpts.description}"
+      ];
+      volumes = volumes;
+      environment = environment;
+    };
+}