[FEAT] Add separate frontend/backend Ingress and runtime API_URL configuration

- Add two Ingress: peikarband.ir (frontend) and api.peikarband.ir (backend)
- Add runtime script to update .web/env.json from API_URL env var
- Remove --backend-only flag to enable both frontend and backend
- Configure API_URL from Helm values instead of build-time args
- Update .dockerignore to include update-env-json.sh script

Dockerfile

@@ -63,6 +63,7 @@ RUN pip install --no-cache-dir --upgrade pip setuptools wheel && \
 COPY --chown=root:root . .
 
 # Build and export Reflex app for production
+# Note: API_URL will be updated at runtime from environment variable
 # Export creates .web directory with frontend static files
 # bun is now pre-installed, so reflex export won't try to download it
 RUN python -m reflex export --no-zip
@@ -128,6 +129,10 @@ COPY --from=builder /root/.local /home/peikarband/.local
 # Copy application code from builder
 COPY --from=builder /build /app
 
+# Copy and set up runtime script
+COPY --chown=peikarband:peikarband scripts/update-env-json.sh /app/scripts/update-env-json.sh
+RUN chmod +x /app/scripts/update-env-json.sh
+
 # Fix ownership
 RUN chown -R peikarband:peikarband /home/peikarband/.local /app
 
@@ -159,7 +164,8 @@ HEALTHCHECK --interval=30s --timeout=10s --start-period=60s --retries=3 \
     CMD curl -f -s -o /dev/null -w "%{http_code}" http://localhost:8000/ping | grep -q "200" || exit 1
 
 # Use tini as init system for proper signal handling
-ENTRYPOINT ["/usr/bin/tini", "--"]
+# Update .web/env.json from API_URL env var, then run the app
+ENTRYPOINT ["/usr/bin/tini", "--", "/app/scripts/update-env-json.sh"]
 
 # Run application (both frontend and backend)
 CMD ["python", "-m", "reflex", "run", "--env", "prod"]