Update Dockerfile for correct directory structure

Dockerfile

@@ -3,10 +3,12 @@ FROM node:20.11-alpine3.19 AS web-builder
 
 # Set working directory for web
 WORKDIR /app/web
-COPY web/package*.json ./
 
-# Install only production dependencies
-RUN npm ci --only=production
+# Copy package files first
+COPY web/package.json web/yarn.lock ./
+
+# Install dependencies using yarn (more reliable than npm for this project)
+RUN yarn install --frozen-lockfile --production=true
 
 # Copy web source files
 COPY web/ .
@@ -14,7 +16,7 @@ COPY web/ .
 # Build web app with optimizations
 ENV NODE_ENV=production
 ENV NEXT_TELEMETRY_DISABLED=1
-RUN npm run build
+RUN yarn build
 
 # Python base image for final stage
 FROM python:3.10-slim-bookworm