How to point a domain into another website's page?

Question

For example, I have a website under the domain example.com. In that site, I have a page like this example.com/hello. Now I need to point my second domain hello.com to that page example.com/hello. It should not be a re-direct. The visitor should stay in hello.com but see the content from the page example.com/hello. Is this possible? Can we do it in dns or in nginx?

The access log after using proxy pass :

123.231.120.120 - - [10/Mar/2016:19:53:18 +0530] "GET / HTTP/1.1" 200 1598 "-" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.87 Safari/537.36"
123.231.120.120 - - [10/Mar/2016:19:53:18 +0530] "GET /a4e1020a9f19bd46f895c136e8e9ecb839666e7b.js?meteor_js_resource=true HTTP/1.1" 404 44 "http://swimamerica.lk/" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.$
123.231.120.120 - - [10/Mar/2016:19:53:18 +0530] "GET /9b342ac50483cb063b76a0b64df1e2d913a82675.css?meteor_css_resource=true HTTP/1.1" 200 73 "http://swimamerica.lk/" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.262$
123.231.120.120 - - [10/Mar/2016:19:53:18 +0530] "GET /images/favicons/favicon-16x16.png HTTP/1.1" 200 1556 "http://swimamerica.lk/" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.87 Safari/537.36"
123.231.120.120 - - [10/Mar/2016:19:53:19 +0530] "GET /images/favicons/favicon-96x96.png HTTP/1.1" 200 1556 "http://swimamerica.lk/" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.87 Safari/537.36"
123.231.120.120 - - [10/Mar/2016:19:53:19 +0530] "GET /images/favicons/favicon-32x32.png HTTP/1.1" 200 1556 "http://swimamerica.lk/" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.87 Safari/537.36"
123.231.120.120 - - [10/Mar/2016:19:53:19 +0530] "GET /images/favicons/android-icon-192x192.png HTTP/1.1" 200 1556 "http://swimamerica.lk/" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.87 Safari/537.36"

Answer 1

You can use proxy_pass directive. Just create a new server associated with the domain hello.com and then for location = / set proxy_pass equals to http://example.com/hello:

server {
    server_name hello.com;
    # ...
    location = / {
        proxy_pass http://example.com/hello/;
    }

    # serve static content (ugly way)
    location ~* \.(jpg|jpeg|gif|png|css|js|ico|xml|rss|txt)$ {
        proxy_pass http://example.com/hello/$uri$is_args$args;
    }

    # serve static content (better way, 
    # but requires collection all assets under the common root)
    location ~ /static/ {
        proxy_pass http://example.com/static/;
    }
}

UPD: Here is an exact solution for your situation:

server {
    server_name swimamerica.lk;

    location = / {
        proxy_pass http://killerwhales.lk/swimamerica;
    }

    # serve static content (ugly way) - added woff and woff2 extentions
    location ~* \.(jpg|jpeg|gif|png|css|js|ico|xml|rss|txt|woff|woff2)$ {
        proxy_pass http://killerwhales.lk$uri$is_args$args;
    }

    # added location for web sockets
    location ~* sockjs {
        proxy_pass http://killerwhales.lk$uri$is_args$args;
    }
}