Remove dockerfile of frontend from root directory

Dockerfile.frontend

@@ -1,21 +0,0 @@
-FROM node:20-alpine AS build
-WORKDIR /app
-
-# Install dependencies
-COPY application/package.json application/package-lock.json ./
-RUN npm ci
-
-# Copy source and build
-COPY application/. .
-RUN npm run build
-
-FROM nginx:1.27-alpine
-RUN rm -rf /usr/share/nginx/html/*
-COPY --from=build /app/dist /usr/share/nginx/html
-
-# SPA fallback + static asset caching
-RUN printf 'server {\n  listen 80;\n  server_name _;\n  root /usr/share/nginx/html;\n  index index.html;\n  location / { try_files $uri $uri/ /index.html; }\n  location ~* \\.(?:js|css|png|jpg|jpeg|gif|svg|ico|woff2?)$ { expires 7d; add_header Cache-Control "public, max-age=604800, immutable"; try_files $uri =404; }\n}\n' > /etc/nginx/conf.d/default.conf
-
-EXPOSE 80
-CMD ["nginx","-g","daemon off;"]
-