Fix Dockerfile: use npm install, copy public folder

Dockerfile

@@ -1,15 +1,15 @@
 FROM node:20-alpine AS builder
 WORKDIR /app
 COPY package*.json ./
-RUN npm ci
+RUN npm install
 COPY . .
 RUN npm run build
 
 FROM node:20-alpine
 WORKDIR /app
 COPY package*.json ./
-RUN npm ci --production
+RUN npm install --production
 COPY --from=builder /app/dist ./dist
-RUN mkdir -p public/icons
+COPY --from=builder /app/public ./public
 EXPOSE 4321
 CMD ["node", "dist/server/entry.mjs"]