nginx_app.conf

location / {
    # try to serve file directly, fallback to rewrite
    try_files $uri @rewriteapp;
}

location @rewriteapp {
    # rewrite all to index.php
    rewrite ^(.*)$ /index.php/$1 last;
}

location ~ ^/index\.php(/|$) {
    try_files @heroku-fcgi @heroku-fcgi;
    # ensure that /index.php isn't accessible directly, but only through a rewrite
    internal;
}

# Caching
location ~* \.(ico|jpg|webp|jpeg|gif|css|png|js|ico|bmp|zip|woff|woff2)$ {
    add_header Pragma public;
    add_header Cache-Control "public";
    expires 7d;
}
location ~* \.(php|html)$ {
    add_header Pragma public;
    add_header Cache-Control "public";
    expires 1d;
}

gzip              on;
gzip_vary         on;
gzip_proxied      any;
gzip_min_length   1k;
gzip_buffers      16 8k;
gzip_http_version 1.1;
gzip_comp_level   9;
gzip_types        text/plain
                  text/javascript
                  text/css
                  text/xml
                  application/json
                  application/javascript
                  application/atom+xml
                  application/rss+xml
                  application/x-javascript
                  application/xml
                  application/xhtml+xml
                  application/x-font-ttf
                  image/svg+xml
#
                  application/csv
                  font/woff
                  font/woff2
                  font/ttf
                  ;