add production description

Author: esbenp

production/README.md

@@ -0,0 +1,40 @@
+# Running pdf-bot in production
+
+## Run pdf-bot using pm2
+
+It is recommended to use [pm2](https://github.com/Unitech/pm2) to run a pdf-bot process.
+
+First install `pm2`
+
+```
+npm install -g pm2
+```
+
+[Create a configuration file using the one in this repo as an example](https://github.com/esbenp/pdf-bot/blob/master/production/pm2.config.js)
+
+`pdf-bot-process.config.js`
+```javascript
+module.exports = {
+  apps : [{
+    name        : "pdf-bot",
+    script      : "pdf-bot",
+    args        : "api -c ./pdf-bot.config.js",
+    // Should be from whatever folder your pdf-bot.config.js is in
+    // cwd         : "/home/[user]/",
+    env: {
+        "DEBUG"   : "pdf:*",
+        "NODE_ENV": "production",
+    },
+  }]
+}
+```
+
+Run in using `pm2 start pdf-bot-process.config.js`
+
+[Read more about starting the app on server restarts](http://pm2.keymetrics.io/docs/usage/startup/)
+
+## Use nginx to proxy requests
+
+If you run `pdf-bot` on port 3000 or similar it is recommended to run it behind an nginx proxy.
+
+Create a site that listens to port 80 and uses the [config from the `production/` folder](https://github.com/esbenp/pdf-bot/blob/master/production/nginx.conf)

production/nginx.conf

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+server {
+  listen 80 default_server;
+  listen [::]:80 default_server;
+
+  server_name pdf-bot;
+
+  location / {
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header Host $http_host;
+        proxy_set_header X-NginX-Proxy true;
+        proxy_pass http://127.0.0.1:3000/;
+        proxy_redirect off;
+        proxy_http_version 1.1;
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection "upgrade";
+
+        proxy_redirect off;
+        proxy_set_header   X-Forwarded-Proto $scheme;
+    }
+}