reverse-proxy-frontend/generate-nginx-config.sh

#!/bin/sh

# Generate nginx.conf based on VITE_BASE_PATH environment variable
BASE_PATH=${VITE_BASE_PATH:-""}

if [ -n "$BASE_PATH" ]; then
    # Configuration for subfolder deployment
    cat > /etc/nginx/nginx.conf << EOF
events {
    worker_connections 1024;
}

http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;
    
    # Logging
    log_format main '\$remote_addr - \$remote_user [\$time_local] "\$request" '
                    '\$status \$body_bytes_sent "\$http_referer" '
                    '"\$http_user_agent" "\$http_x_forwarded_for"';
    
    access_log /var/log/nginx/access.log main;
    error_log /var/log/nginx/error.log warn;
    
    # Gzip compression
    gzip on;
    gzip_vary on;
    gzip_min_length 1024;
    gzip_proxied any;
    gzip_comp_level 6;
    gzip_types
        text/plain
        text/css
        text/xml
        text/javascript
        application/json
        application/javascript
        application/xml+rss
        application/atom+xml
        image/svg+xml;

    server {
        listen 80;
        server_name localhost;
        
        root /usr/share/nginx/html;
        index index.html;
        
        # Security headers
        add_header X-Frame-Options "SAMEORIGIN" always;
        add_header X-XSS-Protection "1; mode=block" always;
        add_header X-Content-Type-Options "nosniff" always;
        add_header Referrer-Policy "no-referrer-when-downgrade" always;
        add_header Content-Security-Policy "default-src 'self' http: https: data: blob: 'unsafe-inline'" always;
        
        # Static assets caching for $BASE_PATH subfolder
        location ~* ^/$BASE_PATH/.*\.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2)\$ {
            expires 1y;
            add_header Cache-Control "public, immutable";
        }
        
        # Main application at /$BASE_PATH/ - SPA fallback
        location /$BASE_PATH/ {
            try_files \$uri \$uri/ /$BASE_PATH/index.html;
        }
        
        # Redirect root to application
        location = / {
            return 301 /$BASE_PATH/;
        }
        
        # Health check endpoint
        location /health {
            access_log off;
            return 200 "healthy\n";
            add_header Content-Type text/plain;
        }
    }
}
EOF
else
    # Configuration for root deployment
    cat > /etc/nginx/nginx.conf << EOF
events {
    worker_connections 1024;
}

http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;
    
    # Logging
    log_format main '\$remote_addr - \$remote_user [\$time_local] "\$request" '
                    '\$status \$body_bytes_sent "\$http_referer" '
                    '"\$http_user_agent" "\$http_x_forwarded_for"';
    
    access_log /var/log/nginx/access.log main;
    error_log /var/log/nginx/error.log warn;
    
    # Gzip compression
    gzip on;
    gzip_vary on;
    gzip_min_length 1024;
    gzip_proxied any;
    gzip_comp_level 6;
    gzip_types
        text/plain
        text/css
        text/xml
        text/javascript
        application/json
        application/javascript
        application/xml+rss
        application/atom+xml
        image/svg+xml;

    server {
        listen 80;
        server_name localhost;
        
        root /usr/share/nginx/html;
        index index.html;
        
        # Security headers
        add_header X-Frame-Options "SAMEORIGIN" always;
        add_header X-XSS-Protection "1; mode=block" always;
        add_header X-Content-Type-Options "nosniff" always;
        add_header Referrer-Policy "no-referrer-when-downgrade" always;
        add_header Content-Security-Policy "default-src 'self' http: https: data: blob: 'unsafe-inline'" always;
        
        # Static assets caching
        location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2)\$ {
            expires 1y;
            add_header Cache-Control "public, immutable";
        }
        
        # Main application - SPA fallback
        location / {
            try_files \$uri \$uri/ /index.html;
        }
        
        # Health check endpoint
        location /health {
            access_log off;
            return 200 "healthy\n";
            add_header Content-Type text/plain;
        }
    }
}
EOF
fi

echo "Generated nginx config for BASE_PATH: '$BASE_PATH'"