refactor: rename canto-backend → backend, canto-frontend → frontend

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/deploy/nginx.conf

@@ -0,0 +1,55 @@
+upstream canto_backend {
+    server 127.0.0.1:8000;
+}
+
+server {
+    listen 80;
+    server_name your-domain.com;
+
+    client_max_body_size 100M;
+    client_body_timeout 300s;
+    proxy_read_timeout 300s;
+    proxy_connect_timeout 300s;
+    proxy_send_timeout 300s;
+
+    location / {
+        proxy_pass http://canto_backend;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+
+        add_header 'Access-Control-Allow-Origin' '*' always;
+        add_header 'Access-Control-Allow-Methods' 'GET, POST, PUT, DELETE, OPTIONS' always;
+        add_header 'Access-Control-Allow-Headers' 'Authorization, Content-Type' always;
+
+        if ($request_method = 'OPTIONS') {
+            add_header 'Access-Control-Allow-Origin' '*';
+            add_header 'Access-Control-Allow-Methods' 'GET, POST, PUT, DELETE, OPTIONS';
+            add_header 'Access-Control-Allow-Headers' 'Authorization, Content-Type';
+            add_header 'Content-Length' '0';
+            add_header 'Content-Type' 'text/plain';
+            return 204;
+        }
+    }
+
+    location /outputs/ {
+        alias /opt/canto-backend/outputs/;
+        autoindex off;
+        add_header Cache-Control "public, max-age=3600";
+        add_header Content-Disposition "attachment";
+    }
+
+    location /health {
+        proxy_pass http://canto_backend/health;
+        proxy_set_header Host $host;
+        access_log off;
+    }
+
+    location /metrics {
+        proxy_pass http://canto_backend/metrics;
+        proxy_set_header Host $host;
+        allow 127.0.0.1;
+        deny all;
+    }
+}

backend/deploy/qwen-tts.service

@@ -0,0 +1,21 @@
+[Unit]
+Description=Canto Backend API Service
+After=network.target
+
+[Service]
+Type=simple
+User=qwen-tts
+Group=qwen-tts
+WorkingDirectory=/opt/canto-backend
+Environment="PATH=/opt/conda/envs/canto/bin:/usr/local/bin:/usr/bin:/bin"
+EnvironmentFile=/opt/canto-backend/.env
+ExecStart=/opt/conda/envs/canto/bin/python main.py
+Restart=on-failure
+RestartSec=10s
+StandardOutput=append:/var/log/qwen-tts/app.log
+StandardError=append:/var/log/qwen-tts/error.log
+TimeoutStopSec=30s
+KillMode=mixed
+
+[Install]
+WantedBy=multi-user.target