fix: remove unnecessary .env.production copy from Dockerfile

.github/workflows/docker-build.yml

@@ -22,7 +22,7 @@ jobs:
       - name: Log in to Container Registry
         uses: docker/login-action@v3
         with:
-          registry: ${{ secrets.DOCKER_REGISTRY }}
+          registry: docker.io
           username: ${{ secrets.DOCKER_LOGIN }}
           password: ${{ secrets.DOCKER_PASSWORD }}
 

Dockerfile

@@ -8,8 +8,6 @@ RUN npm ci
 
 COPY frontend/ .
 
-COPY frontend/.env.production .env
-
 RUN npm run build
 
 FROM golang:1.25.4-alpine3.22 AS backend-builder

frontend/src/lib/api.ts

@@ -17,7 +17,7 @@ import type {
 } from '@/types';
 
 const api = axios.create({
-  baseURL: import.meta.env.VITE_API_URL || 'http://localhost:8080/api',
+  baseURL: '/api',
   headers: {
     'Content-Type': 'application/json',
   },