flake: add docker-image output

docker-image.nix

@@ -0,0 +1,41 @@
+{ dockerTools
+, cctld
+, lib
+,
+}:
+dockerTools.buildLayeredImage {
+  name = "ghcr.io/cspr-rad/cctl-rs";
+  tag = "cctl-casper-node-1.5.7";
+  extraCommands = ''
+    mkdir -p tmp
+  '';
+  config = {
+    Cmd = lib.getExe cctld;
+    ExposedPorts = {
+      # RPC ports
+      "11101/tcp" = { };
+      "11102/tcp" = { };
+      "11103/tcp" = { };
+      "11104/tcp" = { };
+      "11105/tcp" = { };
+      # REST ports
+      "14101/tcp" = { };
+      "14102/tcp" = { };
+      "14103/tcp" = { };
+      "14104/tcp" = { };
+      "14105/tcp" = { };
+      # SSE ports
+      "18101/tcp" = { };
+      "18102/tcp" = { };
+      "18103/tcp" = { };
+      "18104/tcp" = { };
+      "18105/tcp" = { };
+      # Consensus ports
+      "22101/tcp" = { };
+      "22102/tcp" = { };
+      "22103/tcp" = { };
+      "22104/tcp" = { };
+      "22105/tcp" = { };
+    };
+  };
+}

flake.nix

@@ -108,6 +108,8 @@
             });
 
             default = self'.packages.cctld;
+
+            cctl-docker-image = pkgs.callPackage ./docker-image.nix { inherit (self'.packages) cctld; };
           };
 
           checks = {