Configured Docker evironment for frontend

frontend/frontend.dockerfile

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+# Etap 1: Build
+FROM node:20 AS builder
+WORKDIR /app
+COPY package*.json ./
+RUN npm install
+COPY . .
+RUN npm run build
+
+# Etap 2: Nginx
+FROM nginx:alpine
+COPY --from=builder /app/dist /usr/share/nginx/html
+COPY nginx.conf /etc/nginx/conf.d/default.conf
+
+EXPOSE 80
+CMD ["nginx", "-g", "daemon off;"]

frontend/nginx.conf

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+server {
+  listen 80;
+  server_name localhost;
+
+  root /usr/share/nginx/html;
+  index index.html;
+
+  location / {
+    try_files $uri $uri/ /index.html;
+  }
+}