ci: fallback to npm install when web lockfile is missing

Use npm ci only when web/package-lock.json exists to avoid EUSAGE in CI.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: vsilent

.github/workflows/docker.yml

@@ -42,7 +42,11 @@ jobs:
       - name: Build frontend
         working-directory: ./web
         run: |
-          npm ci
+          if [ -f package-lock.json ]; then
+            npm ci
+          else
+            npm install
+          fi
           npm run build
 
       - name: Package app