rebase

deploy/Dockerfile.frontend

@@ -1,14 +1,32 @@
 # Build stage
 FROM node:20-alpine AS build
 WORKDIR /app
+
+# Bake the API base URL into the Vite bundle at build time.
+# Default is the relative "/api" — works when the app is served from the same
+# origin as the /api reverse proxy (nginx in front of the backend).
+ARG VITE_API_BASE_URL=/api
+ENV VITE_API_BASE_URL=$VITE_API_BASE_URL
+
+# Copy frontend manifest first for better layer caching
 COPY frontend/package*.json ./
 RUN npm install
+
+# Copy the rest of the frontend source and build
 COPY frontend/ .
 RUN npm run build
 
-# Serve stage
+# -------------------------------------------------------------------
+# Serve stage — nginx
+# -------------------------------------------------------------------
 FROM nginx:1.24-alpine
+
+# Copy built static assets from the build stage
 COPY --from=build /app/dist /usr/share/nginx/html
+
+# Copy nginx config (path is relative to the build context, which is the project root)
 COPY deploy/nginx.conf /etc/nginx/conf.d/default.conf
+
 EXPOSE 80
+
 CMD ["nginx", "-g", "daemon off;"]