feat: replace npm install with npm ci.

Author: Lukas249

Dockerfile

@@ -1,7 +1,7 @@
 FROM node:22.14.0
 WORKDIR /usr/local/app
 COPY package*.json ./
-RUN npm install
+RUN npm ci --include=prod
 COPY . .
 EXPOSE 3000
 CMD ["sh", "-c", "npm run build && npm run start"]