add oci image to flake

flake.nix

@@ -70,8 +70,24 @@
         };
       in
       {
-        packages = {
+        packages = rec {
           default = (mkScope pkgs).default;
+          oci-image = pkgs.dockerTools.buildImage {
+            name = default.pname;
+            tag = "next";
+            copyToRoot = [
+              pkgs.dockerTools.caCertificates
+            ];
+            config = {
+              # Use the `tini` init system so that signals (e.g. ctrl+c/SIGINT)
+              # are handled as expected
+              Entrypoint = [
+                "${pkgs.lib.getExe' pkgs.tini "tini"}"
+                "--"
+                "${pkgs.lib.getExe default}"
+              ];
+            };
+          };
         }
         //
         builtins.listToAttrs