Agregar docker-compose y Dockerfiles para EasyPanel

frontend/.dockerignore

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+node_modules/
+dist/
+.vite/
+.env

frontend/Dockerfile

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+# --- Etapa 1: build de la app React/Vite ---
+FROM node:20-alpine AS build
+WORKDIR /app
+
+COPY package*.json ./
+RUN npm install
+
+COPY . .
+
+# VITE_API_URL debe pasarse como build-arg / env en el momento del build,
+# ya que Vite la "quema" dentro del bundle estatico.
+ARG VITE_API_URL
+ENV VITE_API_URL=$VITE_API_URL
+
+RUN npm run build
+
+# --- Etapa 2: servir los archivos estaticos con nginx ---
+FROM nginx:alpine
+COPY --from=build /app/dist /usr/share/nginx/html
+COPY nginx.conf /etc/nginx/conf.d/default.conf
+
+EXPOSE 80

frontend/nginx.conf

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+server {
+    listen 80;
+    server_name _;
+    root /usr/share/nginx/html;
+    index index.html;
+
+    # Soporte para rutas de SPA (React Router / navegacion interna)
+    location / {
+        try_files $uri $uri/ /index.html;
+    }
+
+    gzip on;
+    gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;
+}