ci: add upload artifacts step

.drone.yml

@@ -33,11 +33,11 @@ steps:
       - nix $$NIX_FLAGS develop --command echo OK
 
   - name: "Upload artifacts"
-    environment:
-      TARGET_DIR: $${DRONE_REPO}/$${DRONE_BUILD_NUMBER}
     commands:
+      - export TARGET_DIR="$${DRONE_REPO}/$${DRONE_BUILD_NUMBER}"
       - echo env var TARGET_DIR is set to $$TARGET_DIR
       - nix flake new --template "git+https://git.greenbaum.cloud/dev/tritonshell?ref=main" ./tritonshell
+      - git add tritonshell
       - cd tritonshell
       - nix develop --command triton profile set lev-1.pub.solar \
           && mput -p -f ./result/foot_wayland_info.png ~~/public/$${DRONE_REPO}/$${DRONE_BUILD_NUMBER} \
@@ -101,6 +101,6 @@ volumes:
 
 ---
 kind: signature
-hmac: 383931b0342f4ff5a5f239ccbfea2f0a9d852f9eec42639c940837dcea4675e7
+hmac: f226b14a22ff686348fbb1f88b6759089a1a46f18a72ebd70bd7f170c262f99a
 
 ...