ci: add upload artifacts step

.drone.yml

@@ -45,6 +45,7 @@ steps:
       - echo env var TARGET_DIR is set to $$TARGET_DIR
       - "mkdir ~/.ssh && chmod 700 ~/.ssh"
       - "echo $$PRIVATE_SSH_KEY > ~/.ssh/id_ed25519 && chmod 600 ~/.ssh/id_ed25519"
+      - eval "$(/run/current-system/sw/bin/ssh-agent)"
       - /run/current-system/sw/bin/ssh-add ~/.ssh/id_ed25519
       - nix flake new --template "git+https://git.greenbaum.cloud/dev/tritonshell?ref=main" ./tritonshell
       - git add tritonshell
@@ -110,6 +111,6 @@ volumes:
 
 ---
 kind: signature
-hmac: ee8318848826543c977d009ea28d1844d8be23a5010a00afba3f67c3317e18f6
+hmac: fbf5e1c470ad2bf0303a473b9388e31836a0e6718ef5c1cf3eac743602da0b50
 
 ...