Docker update

Dockerfile

@@ -1,20 +1,18 @@
-# Build stage
 FROM node:18 AS build
 
 WORKDIR /app
 
+# Copy only package files first (better caching)
 COPY package*.json ./
-RUN npm install --legacy-peer-deps
 
+# This layer will be cached if package.json doesn't change
+RUN npm ci --legacy-peer-deps
+
+# Copy source code (this changes more often)
 COPY . .
 RUN npm run build
 
-# Production stage
 FROM nginx:alpine
-
 COPY --from=build /app/public /usr/share/nginx/html
-
-# Fix for Gatsby client-side routing
 RUN echo 'server { listen 80; root /usr/share/nginx/html; index index.html; location / { try_files $uri $uri/ /index.html; } }' > /etc/nginx/conf.d/default.conf
-
 EXPOSE 80