[tech] nginx配信時にgzip圧縮する

```
           index index.html index.htm;

           location / {
        -    gzip on;
        -
             try_files $uri $uri/ /  index.html;
           }

           location = /index.html {
        -    gzip on;
             expires 5m;
           }

           location ~* /.*\.(js|css)$ {
        -    gzip on;
             expires 3d;
           }

           location ~* /.*\.html$ {
        -    gzip on;
             expires 24h;
           }

           location /images {
        -    gzip on;
             expires max;
           }
         }
```