fix: docker container are starting

frontend/Dockerfile

@@ -3,17 +3,25 @@ FROM node:22-alpine AS builder
 WORKDIR /app
 
 COPY package.json package-lock.json ./
+COPY backend/package.json backend/
+COPY frontend/package.json frontend/
+COPY shared/package.json shared/
+
 RUN npm ci
 
-COPY . .
-RUN npm run build
+COPY shared/ shared/
+COPY frontend/ frontend/
+
+# Build shared first, then frontend
+RUN npm run build --workspace=shared
+RUN npm run build --workspace=frontend
 
 FROM nginx:alpine AS runner
 
 WORKDIR /usr/share/nginx/html
-COPY --from=builder /app/dist .
+COPY --from=builder /app/frontend/dist .
 
-COPY nginx.conf /etc/nginx/templates/default.conf.template
+COPY frontend/nginx.conf /etc/nginx/templates/default.conf.template
 
 EXPOSE 80
 CMD ["nginx", "-g", "daemon off;"]