Replacing php-fpm

We need to modify the server block in /etc/nginx/sites-enabled/digitalocean to switch from php to pcp.
Note: pcp uses nginx as a reverse proxy instead of FastCGI.

Change the index to be index.clj instead of index.php

...
    #default nginx config on digital ocean lemp image
    #index index.php index.html index.htm;

    #new pcp config => change .php to .clj
    index index.clj index.html index.htm;
...

Send our scripts to our PCP server on port 9000 and change the filter to be ~ \.clj$ instead of ~ \.php$.

...
    #default nginx config on digital ocean lemp image
    #location ~ \.php$ {

    #new pcp config => change .php to .clj
    location ~ \.clj$ {
        #default nginx config on digital ocean lemp image
        #include snippets/fastcgi-php.conf;
        #fastcgi_pass unix:/run/php/php7.0-fpm.sock;

        #v0.0.1
        include scgi_params;
        scgi_pass  127.0.0.1:9000;

        #v0.0.2
        proxy_pass http://127.0.0.1:9000;
        proxy_set_header document-root $document_root;
    }
...

Here's an example for v0.0.1 and below.
And here's one for v0.0.2 and above.

One last check, to make sure that the pcp service is running:

$ pcp service status

And now we can restart nginx with our new configuration.

$ service nginx restart

Would you look at that. You're running clojure and your server didn't even flinch.