invoice-ninja: Deploy Invoice Ninja

Invoice Ninja is a small business management tool.  Tabitha wants to
use it for HLC.

I am a bit concerned about the code quality of this application, and
definitely alarmed at the data it send upstream, so I have tried to be
extra careful with it.  All privileges are revoked, including access to
the Internet.

invoice-ninja/nginx.conf

@@ -0,0 +1,68 @@
+worker_processes auto;
+
+error_log /var/log/nginx/error.log notice;
+
+pid /run/nginx/nginx.pid;
+
+events {
+    worker_connections 1024;
+}
+
+http {
+    include /etc/nginx/mime.types;
+    default_type application/octet-stream;
+
+    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
+                      '$status $body_bytes_sent "$http_referer" '
+                      '"$http_user_agent" "$http_x_forwarded_for"';
+    access_log  /var/log/nginx/access.log  main;
+
+    sendfile on;
+
+    gzip on;
+
+    keepalive_timeout 65;
+
+    upstream backend {
+        server 127.0.0.1:9000;
+    }
+
+    server {
+        listen 8000 default;
+        server_name _;
+
+        root /var/www/app/public;
+
+        index index.php;
+
+        charset utf-8;
+
+        location / {
+            try_files $uri $uri/ /index.php?$query_string;
+        }
+
+        location /health {
+            return 200 'UP';
+        }
+
+        location ~ \.php$ {
+            fastcgi_split_path_info ^(.+\.php)(/.+)$;
+            fastcgi_pass backend;
+            fastcgi_index index.php;
+            include fastcgi_params;
+            fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
+            fastcgi_intercept_errors on;
+            fastcgi_buffer_size 16k;
+            fastcgi_buffers 4 16k;
+        }
+
+        location ~ /\.ht {
+            deny all;
+        }
+
+        error_page   500 502 503 504  /50x.html;
+        location = /50x.html {
+            root   /usr/share/nginx/html;
+        }
+    }
+}