Refactor Dockerfile package installation to remove `npm ci` for `package-lock.json` and clarify fresh `npm install` fallback.

Dockerfile

@@ -10,9 +10,10 @@ WORKDIR /app
 COPY package.json yarn.lock* package-lock.json* pnpm-lock.yaml* ./
 RUN \
   if [ -f yarn.lock ]; then yarn --frozen-lockfile; \
-  elif [ -f package-lock.json ]; then npm ci; \
   elif [ -f pnpm-lock.yaml ]; then corepack enable pnpm && pnpm i --frozen-lockfile; \
-  else echo "Lockfile not found. Running npm install to generate one." && npm install; \
+  else \
+  # Force fresh install since we don't have a valid lockfile yet
+  echo "Running fresh npm install..." && npm install; \
   fi