diff --git a/services/docstore/app.js b/services/docstore/app.js
index c32e3a6b19..2a14168054 100644
--- a/services/docstore/app.js
+++ b/services/docstore/app.js
@@ -1,67 +1,86 @@
-Metrics    = require "metrics-sharelatex"
-Metrics.initialize("docstore")
-Settings   = require "settings-sharelatex"
-logger     = require "logger-sharelatex"
-express    = require "express"
-bodyParser = require "body-parser"
-Errors     = require "./app/js/Errors"
-HttpController = require "./app/js/HttpController"
-Path       = require "path"
+/*
+ * decaffeinate suggestions:
+ * DS102: Remove unnecessary code created because of implicit returns
+ * DS207: Consider shorter variations of null checks
+ * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
+ */
+const Metrics    = require("metrics-sharelatex");
+Metrics.initialize("docstore");
+const Settings   = require("settings-sharelatex");
+const logger     = require("logger-sharelatex");
+const express    = require("express");
+const bodyParser = require("body-parser");
+const Errors     = require("./app/js/Errors");
+const HttpController = require("./app/js/HttpController");
+const Path       = require("path");
 
 
-logger.initialize("docstore")
-Metrics.event_loop?.monitor(logger)
+logger.initialize("docstore");
+if (Metrics.event_loop != null) {
+	Metrics.event_loop.monitor(logger);
+}
 
-app = express()
+const app = express();
 
-app.use Metrics.http.monitor(logger)
+app.use(Metrics.http.monitor(logger));
 
-Metrics.injectMetricsRoute(app)
+Metrics.injectMetricsRoute(app);
 
-app.param 'project_id', (req, res, next, project_id) ->
-	if project_id?.match /^[0-9a-f]{24}$/
-		next()
-	else
-		next new Error("invalid project id")
+app.param('project_id', function(req, res, next, project_id) {
+	if ((project_id != null ? project_id.match(/^[0-9a-f]{24}$/) : undefined)) {
+		return next();
+	} else {
+		return next(new Error("invalid project id"));
+	}
+});
 
-app.param 'doc_id', (req, res, next, doc_id) ->
-	if doc_id?.match /^[0-9a-f]{24}$/
-		next()
-	else
-		next new Error("invalid doc id")
+app.param('doc_id', function(req, res, next, doc_id) {
+	if ((doc_id != null ? doc_id.match(/^[0-9a-f]{24}$/) : undefined)) {
+		return next();
+	} else {
+		return next(new Error("invalid doc id"));
+	}
+});
 
-Metrics.injectMetricsRoute(app)
+Metrics.injectMetricsRoute(app);
 
-app.get  '/project/:project_id/doc', HttpController.getAllDocs
-app.get  '/project/:project_id/ranges', HttpController.getAllRanges
-app.get  '/project/:project_id/doc/:doc_id', HttpController.getDoc
-app.get  '/project/:project_id/doc/:doc_id/raw', HttpController.getRawDoc
-# Add 64kb overhead for the JSON encoding, and double the size to allow for ranges in the json payload
-app.post '/project/:project_id/doc/:doc_id', bodyParser.json(limit: (Settings.max_doc_length + 64 * 1024) * 2), HttpController.updateDoc
-app.del  '/project/:project_id/doc/:doc_id', HttpController.deleteDoc
+app.get('/project/:project_id/doc', HttpController.getAllDocs);
+app.get('/project/:project_id/ranges', HttpController.getAllRanges);
+app.get('/project/:project_id/doc/:doc_id', HttpController.getDoc);
+app.get('/project/:project_id/doc/:doc_id/raw', HttpController.getRawDoc);
+// Add 64kb overhead for the JSON encoding, and double the size to allow for ranges in the json payload
+app.post('/project/:project_id/doc/:doc_id', bodyParser.json({limit: (Settings.max_doc_length + (64 * 1024)) * 2}), HttpController.updateDoc);
+app.del('/project/:project_id/doc/:doc_id', HttpController.deleteDoc);
 
-app.post  '/project/:project_id/archive', HttpController.archiveAllDocs
-app.post  '/project/:project_id/unarchive', HttpController.unArchiveAllDocs
-app.post  '/project/:project_id/destroy', HttpController.destroyAllDocs
+app.post('/project/:project_id/archive', HttpController.archiveAllDocs);
+app.post('/project/:project_id/unarchive', HttpController.unArchiveAllDocs);
+app.post('/project/:project_id/destroy', HttpController.destroyAllDocs);
 
-app.get "/health_check",  HttpController.healthCheck
+app.get("/health_check",  HttpController.healthCheck);
 
-app.get '/status', (req, res)->
-	res.send('docstore is alive')
+app.get('/status', (req, res) => res.send('docstore is alive'));
 
-app.use (error, req, res, next) ->
-	logger.error err: error, req:req, "request errored"
-	if error instanceof Errors.NotFoundError
-		res.send 404
-	else
-		res.send(500, "Oops, something went wrong")
+app.use(function(error, req, res, next) {
+	logger.error({err: error, req}, "request errored");
+	if (error instanceof Errors.NotFoundError) {
+		return res.send(404);
+	} else {
+		return res.send(500, "Oops, something went wrong");
+	}
+});
 
-port = Settings.internal.docstore.port
-host = Settings.internal.docstore.host
+const {
+    port
+} = Settings.internal.docstore;
+const {
+    host
+} = Settings.internal.docstore;
 
-if !module.parent # Called directly
-	app.listen port, host, (error) ->
-		throw error if error?
-		logger.info "Docstore starting up, listening on #{host}:#{port}"
+if (!module.parent) { // Called directly
+	app.listen(port, host, function(error) {
+		if (error != null) { throw error; }
+		return logger.info(`Docstore starting up, listening on ${host}:${port}`);
+	});
+}
 
-module.exports = app
+module.exports = app;
diff --git a/services/docstore/config/settings.defaults.js b/services/docstore/config/settings.defaults.js
index e45570d3fe..849fea56a1 100644
--- a/services/docstore/config/settings.defaults.js
+++ b/services/docstore/config/settings.defaults.js
@@ -1,31 +1,44 @@
-http = require('http')
-http.globalAgent.maxSockets = 300
+/*
+ * decaffeinate suggestions:
+ * DS207: Consider shorter variations of null checks
+ * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
+ */
+const http = require('http');
+http.globalAgent.maxSockets = 300;
 
-Settings =
-	internal:
-		docstore:
-			port: 3016
-			host: process.env['LISTEN_ADDRESS'] or "localhost"
+const Settings = {
+	internal: {
+		docstore: {
+			port: 3016,
+			host: process.env['LISTEN_ADDRESS'] || "localhost"
+		}
+	},
 
-	mongo:{}
+	mongo:{},
 
-	docstore:
-		healthCheck:
+	docstore: {
+		healthCheck: {
 			project_id: process.env['HEALTH_CHECK_PROJECT_ID']
+		}
+	},
 
-	max_doc_length: 2 * 1024 * 1024 # 2mb
+	max_doc_length: 2 * 1024 * 1024 // 2mb
+};
 
-if process.env['MONGO_CONNECTION_STRING']?
-	Settings.mongo.url = process.env['MONGO_CONNECTION_STRING']
-else if process.env['MONGO_HOST']?
-	Settings.mongo.url = "mongodb://#{process.env['MONGO_HOST']}/sharelatex"
-else
-	Settings.mongo.url = "mongodb://127.0.0.1/sharelatex"
+if (process.env['MONGO_CONNECTION_STRING'] != null) {
+	Settings.mongo.url = process.env['MONGO_CONNECTION_STRING'];
+} else if (process.env['MONGO_HOST'] != null) {
+	Settings.mongo.url = `mongodb://${process.env['MONGO_HOST']}/sharelatex`;
+} else {
+	Settings.mongo.url = "mongodb://127.0.0.1/sharelatex";
+}
 
-if process.env['AWS_ACCESS_KEY_ID']? and process.env['AWS_SECRET_ACCESS_KEY']? and process.env['AWS_BUCKET']?
-	Settings.docstore.s3 =
-		key: process.env['AWS_ACCESS_KEY_ID']
-		secret: process.env['AWS_SECRET_ACCESS_KEY']
+if ((process.env['AWS_ACCESS_KEY_ID'] != null) && (process.env['AWS_SECRET_ACCESS_KEY'] != null) && (process.env['AWS_BUCKET'] != null)) {
+	Settings.docstore.s3 = {
+		key: process.env['AWS_ACCESS_KEY_ID'],
+		secret: process.env['AWS_SECRET_ACCESS_KEY'],
 		bucket: process.env['AWS_BUCKET']
+	};
+}
 
-module.exports = Settings
+module.exports = Settings;