ci: debug Host key verification failed error

.drone.yml

@@ -32,6 +32,10 @@ steps:
       - "mkdir ~/.ssh && chmod 700 ~/.ssh"
       - echo "$$PRIVATE_SSH_KEY" > ~/.ssh/id_ed25519 && chmod 600 ~/.ssh/id_ed25519
       - echo "$$SSH_HOST_KEY" > ~/.ssh/known_hosts
+      - echo DEBUG env
+      - env
+      - echo DEBUG ls -alh ~/.ssh
+      - ls -alh ~/.ssh
       - 'echo DEBUG: Using NIX_FLAGS: $NIX_FLAGS'
       - nix $$NIX_FLAGS develop --command deploy --magic-rollback false --skip-checks --targets '.#host_001_momo_koeln' --ssh-opts='-v'
 
@@ -159,6 +163,6 @@ volumes:
 
 ---
 kind: signature
-hmac: 89c7757736896b56f4ffe01fe14b47fe8606a99c326e31c57863d1836901c087
+hmac: b51c074c744543cdd1596025708b7a79203038b948bedcca553644d7631d7833
 
 ...