Increase body size limit (#16)

* Increase body size limit

The default limit of the json body parser is 100kb, which does not allow for rendering large documents.

Increase the limit to 2mb to be in line with the default nginx body size limit.

* Make body size limit configurable

Allow the default value of 2mb to be overridden if required with an environment variable

config.js

@@ -5,7 +5,8 @@ const config = {
   port: process.env.APP_PORT || 8001,
   host: process.env.APP_HOST || 'localhost',
   env: process.env.NODE_ENV,
-  loglevel: process.env.LOG_LEVEL
+  loglevel: process.env.LOG_LEVEL,
+  limit: process.env.BODY_SIZE_LIMIT || '2mb'
 };
 
 module.exports = config;

index.js

@@ -12,7 +12,7 @@ const errorHandler = require('./middleware/error-handler');
 
 app.use(churchill(logger));
 
-app.use(bodyParser.json());
+app.use(bodyParser.json({ limit: config.limit }));
 
 app.use('/convert', controller);
 app.use(errorHandler);