feat(logging): Exclude /status route from logging

This patch should reduce the logging noise a lot, by removing the
`/status` route from logging unless hedgedoc is running in debug mode or
the route throws an error code.

This is achieved by providing a "skip"-function to the morgan logging
provider.

Signed-off-by: Sheogorath <sheogorath@shivering-isles.com>

app.js

@@ -65,6 +65,12 @@ if (!config.useSSL && config.protocolUseSSL) {
 
 // logger
 app.use(morgan('combined', {
+  skip: function(req, res) {
+    // skip logging if specified
+    // unless the app is running in debug mode
+    // or throws an error
+    return req.skipLogging && config.loglevel !== "debug" && res.statusCode < 400
+  },
   stream: logger.stream
 }))
 

lib/web/statusRouter.js

@@ -14,6 +14,7 @@ const statusRouter = module.exports = Router()
 
 // get status
 statusRouter.get('/status', function (req, res, next) {
+  req.skipLogging = true
   realtime.getStatus(function (data) {
     res.set({
       'Cache-Control': 'private', // only cache by client