some more adjustments, tried to get vs code to work

modules/home-manager/ssh.nix

@@ -0,0 +1,20 @@
+{ lib, config, ... }:
+{
+  programs.ssh.enable = true;
+  programs.ssh.matchBlocks = {
+    ela = lib.hm.dag.entryBefore ["eiger"] {
+      hostname = "ela.cscs.ch";
+      user = "rmoll";
+      identityFile = "${config.home.homeDirectory}/.ssh/cscs-key";
+      identitiesOnly = true;
+    };
+
+    eiger = {
+      hostname = "eiger.cscs.ch";
+      user = "rmoll";
+      identityFile = "${config.home.homeDirectory}/.ssh/cscs-key";
+      identitiesOnly = true;
+      proxyJump = "ela";
+    };
+  };
+}