openpetswithchatandmcp/website/nginx.conf

# WebSocket connection upgrade map
map $http_upgrade $connection_upgrade {
    default upgrade;
    '' close;
}

# Overleaf backend upstream
upstream overleaf {
    server overleaf:80;
}

# HTTP server
server {
    listen 80;
    server_name _;
    root /usr/share/nginx/html;
    index index.html;

    # Enable gzip compression
    gzip on;
    gzip_vary on;
    gzip_min_length 10240;
    gzip_proxied expired no-cache no-store private auth;
    gzip_types text/plain text/css text/xml text/javascript application/x-javascript application/xml+rss application/json;
    gzip_disable "MSIE [1-6]\.";

    # Security headers
    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 "no-referrer-when-downgrade" always;
    add_header Content-Security-Policy "upgrade-insecure-requests" always;

    # Upstream proxy settings for Overleaf
    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_redirect off;
    client_max_body_size 50m;

    # Proxy Overleaf auth endpoints
    location = /login {
        proxy_pass http://overleaf;
    }
    location = /logout {
        proxy_pass http://overleaf;
    }

    # Proxy Overleaf API endpoints
    location ^~ /api/ {
        proxy_pass http://overleaf;
    }
    location ^~ /user/ {
        proxy_pass http://overleaf;
    }
    
    # Private endpoints need Basic Auth - MUST come before general /project/ location
    location ~ ^/project/[^/]+/join$ {
        proxy_pass http://overleaf;
        proxy_set_header Authorization "Basic YXBpdXNlcjphcGlwYXNz";
        proxy_pass_request_headers on;
        proxy_set_header Cookie $http_cookie;
    }
    location ~ ^/project/[^/]+/doc/ {
        proxy_pass http://overleaf;
        proxy_set_header Authorization "Basic YXBpdXNlcjphcGlwYXNz";
        proxy_pass_request_headers on;
        proxy_set_header Cookie $http_cookie;
    }
    location ~ ^/project/[^/]+/compile {
        proxy_pass http://overleaf;
        proxy_pass_request_headers on;
        proxy_set_header Cookie $http_cookie;
        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;
    }
    location ~ ^/project/[^/]+/output/ {
        proxy_pass http://overleaf;
        proxy_pass_request_headers on;
        proxy_set_header Cookie $http_cookie;
        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;
    }
    location ^~ /internal/ {
        proxy_pass http://overleaf;
        proxy_set_header Authorization "Basic YXBpdXNlcjphcGlwYXNz";
        proxy_pass_request_headers on;
        proxy_set_header Cookie $http_cookie;
    }
    
    # General project endpoints (without ^~ so regex patterns above are checked first)
    location /project/ {
        proxy_pass http://overleaf;
        proxy_pass_request_headers on;
        proxy_set_header Cookie $http_cookie;
        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;
    }
    location /Project/ {
        proxy_pass http://overleaf;
    }
    # Block direct access to Overleaf's project list UI to avoid confusion
    location = /project {
        return 302 /;
    }

    # WebSocket support for real-time collaboration
    location /socket.io/ {
        proxy_pass http://overleaf;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $connection_upgrade;
        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_set_header Cookie $http_cookie;
        proxy_read_timeout 86400;
        proxy_buffering off;
    }

    # SPA fallback - serve index.html for all non-API routes
    location / {
        try_files $uri $uri/ /index.html;
    }

    # Cache static assets
    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
        expires 1y;
        add_header Cache-Control "public, immutable";
    }

    # Disable cache for index.html
    location = /index.html {
        add_header Cache-Control "no-cache, no-store, must-revalidate";
        add_header Pragma "no-cache";
        add_header Expires 0;
    }

    # Health check endpoint
    location /health {
        access_log off;
        return 200 "healthy\n";
        add_header Content-Type text/plain;
    }
}