refactor: change ports to non-standard (backend: 8765, frontend: 4321)

backend/Dockerfile

@@ -7,6 +7,6 @@ RUN pip install --no-cache-dir -r requirements.txt
 
 COPY . .
 
-EXPOSE 8000
+EXPOSE 8765
 
-CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000"]
+CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8765"]

backend/app/main.py

@@ -10,7 +10,7 @@ app = FastAPI(title="Kopilka API", version="1.0.0")
 
 app.add_middleware(
     CORSMiddleware,
-    allow_origins=["http://localhost:5173", "http://localhost:3000"],
+    allow_origins=["http://localhost:5173", "http://localhost:4321"],
     allow_credentials=True,
     allow_methods=["*"],
     allow_headers=["*"],