chore: add ansible backend docker frontend-prep

ansible/templates/backend.service.j2

@@ -0,0 +1,12 @@
+[Unit]
+Description=Backend Golang API
+After=network.target
+
+[Service]
+User={{ user_owner }}
+WorkingDirectory={{ backend_dir }}
+ExecStart={{ backend_binary }}
+Restart=always
+
+[Install]
+WantedBy=multi-user.target

ansible/templates/frontend.service.j2

@@ -0,0 +1,14 @@
+[Unit]
+Description=Frontend React Production (Vite)
+After=network.target
+
+[Service]
+User={{ user_owner }}
+Group={{ user_owner }}
+WorkingDirectory={{ nginx_frontend_path }}
+ExecStart=/usr/bin/npm run preview -- --port {{ frontend_port }}
+Restart=always
+Environment=NODE_ENV=production
+
+[Install]
+WantedBy=multi-user.target

ansible/templates/nginx.conf.j2

@@ -0,0 +1,79 @@
+upstream backend {
+    server 127.0.0.1:{{ backend_port }} max_fails=3 fail_timeout=30s;
+    keepalive 32;
+}
+
+server {
+    listen 80;
+    listen [::]:80;
+    server_name {{ nginx_domain }};
+    root {{ nginx_frontend_path }}/dist;
+    index index.html;
+
+    access_log /var/log/nginx/{{ nginx_app_name }}.access.log;
+    error_log /var/log/nginx/{{ nginx_app_name }}.error.log;
+
+    client_max_body_size {{ nginx_max_body_size }};
+
+    location /api/ {
+        limit_except GET POST PUT DELETE PATCH OPTIONS {
+            deny all;
+        }
+
+        proxy_pass http://backend/;
+        proxy_http_version 1.1;
+        proxy_set_header Connection "";
+        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;
+
+        proxy_connect_timeout {{ nginx_proxy_timeout }}s;
+        proxy_send_timeout {{ nginx_proxy_timeout }}s;
+        proxy_read_timeout {{ nginx_proxy_timeout }}s;
+
+        proxy_buffering on;
+        proxy_buffer_size 4k;
+        proxy_buffers 8 4k;
+        proxy_no_cache 1;
+        proxy_cache_bypass 1;
+    }
+
+    location / {
+        try_files $uri $uri/ /index.html;
+        add_header Cache-Control "no-cache, no-store, must-revalidate";
+    }
+
+    location ~* \.(css|js)$ {
+        expires {{ nginx_cache_static_duration }};
+        add_header Cache-Control "public, immutable";
+        access_log off;
+    }
+
+    location ~* \.(jpg|jpeg|png|gif|ico|svg|woff|woff2|ttf|eot)$ {
+        expires {{ nginx_cache_media_duration }};
+        add_header Cache-Control "public, immutable";
+        access_log off;
+    }
+
+    location = /health {
+        access_log off;
+        return 200 "healthy\n";
+        add_header Content-Type text/plain;
+    }
+
+    add_header X-Frame-Options "SAMEORIGIN" always;
+    add_header X-Content-Type-Options "nosniff" always;
+    add_header X-XSS-Protection "1; mode=block" always;
+    add_header Referrer-Policy "strict-origin-when-cross-origin" always;
+
+    location ~ /\. {
+        deny all;
+        access_log off;
+        log_not_found off;
+    }
+
+    location ~* (\.env|\.git|package\.json|package-lock\.json|yarn\.lock)$ {
+        deny all;
+    }
+}

ansible/templates/tunnel.service.j2

@@ -0,0 +1,25 @@
+[Unit]
+Description=Serveo Tunnel Service
+After=network-online.target nginx.service
+Wants=network-online.target
+
+[Service]
+Type=simple
+User=ubuntu
+WorkingDirectory={{directory}}
+ExecStart=/usr/bin/ssh \
+    -o ServerAliveInterval=60 \
+    -o ServerAliveCountMax=3 \
+    -o ExitOnForwardFailure=yes \
+    -o StrictHostKeyChecking=no \
+    -R {{nginx_app_name}}:80:{{nginx_domain}}:80 \
+    serveo.net
+
+Restart=always
+RestartSec=10
+
+StandardOutput=append:{{tunnel_log}}
+StandardError=append:{{tunnel_log_error}}
+
+[Install]
+WantedBy=multi-user.target