Refactor deployment workflow to separate commands for improved readability

.forgejo/workflows/deploy.yml

@@ -16,14 +16,15 @@ jobs:
       - name: Build
         run: |
           source /etc/bashrc
-          nix shell nixpkgs#bun --run "bun i && bun run build"
+          nix shell nixpkgs#bun
+          bun i && bun run build
           
       - name: Deploy
         run: |
           source /etc/bashrc
-          # rsync의 ssh 옵션에 -i ssh_key를 직접 지정
-          nix shell nixpkgs#rsync nixpkgs#openssh --run \
-            "rsync -avz --delete -e 'ssh -i ssh_key -o StrictHostKeyChecking=no' dist/* imnyang@10.11.8.101:/var/static/imnya.ng/."
+          nix shell nixpkgs#rsync nixpkgs#openssh
+          
+          rsync -avz --delete -e 'ssh -i ssh_key -o StrictHostKeyChecking=no' dist/* imnyang@10.11.8.101:/var/static/imnya.ng/.
 
       - name: Cleanup
         if: always()