diff --git a/services/filestore/config/settings.defaults.js b/services/filestore/config/settings.defaults.js
index dfa373bcb0..2327f50ea9 100644
--- a/services/filestore/config/settings.defaults.js
+++ b/services/filestore/config/settings.defaults.js
@@ -1,3 +1,8 @@
+/* eslint-disable
+    no-path-concat,
+*/
+// TODO: This file was created by bulk-decaffeinate.
+// Fix any style issues and re-enable lint.
 /*
  * decaffeinate suggestions:
  * DS207: Consider shorter variations of null checks
@@ -7,25 +12,25 @@ const Path = require("path");
 
 // environment variables renamed for consistency
 // use AWS_ACCESS_KEY_ID-style going forward
-if (process.env['AWS_KEY'] && !process.env['AWS_ACCESS_KEY_ID']) {
-	process.env['AWS_ACCESS_KEY_ID'] = process.env['AWS_KEY'];
+if (process.env.AWS_KEY && !process.env.AWS_ACCESS_KEY_ID) {
+	process.env.AWS_ACCESS_KEY_ID = process.env.AWS_KEY;
 }
-if (process.env['AWS_SECRET'] && !process.env['AWS_SECRET_ACCESS_KEY']) {
-	process.env['AWS_SECRET_ACCESS_KEY'] = process.env['AWS_SECRET'];
+if (process.env.AWS_SECRET && !process.env.AWS_SECRET_ACCESS_KEY) {
+	process.env.AWS_SECRET_ACCESS_KEY = process.env.AWS_SECRET;
 }
 
 // pre-backend setting, fall back to old behaviour
-if (process.env['BACKEND'] == null) {
-	if ((process.env['AWS_ACCESS_KEY_ID'] != null) || (process.env['S3_BUCKET_CREDENTIALS'] != null)) {
-		process.env['BACKEND'] = "s3";
-		process.env['USER_FILES_BUCKET_NAME'] = process.env['AWS_S3_USER_FILES_BUCKET_NAME'];
-		process.env['TEMPLATE_FILES_BUCKET_NAME'] = process.env['AWS_S3_TEMPLATE_FILES_BUCKET_NAME'];
-		process.env['PUBLIC_FILES_BUCKET_NAME'] = process.env['AWS_S3_PUBLIC_FILES_BUCKET_NAME'];
+if (process.env.BACKEND == null) {
+	if ((process.env.AWS_ACCESS_KEY_ID != null) || (process.env.S3_BUCKET_CREDENTIALS != null)) {
+		process.env.BACKEND = "s3";
+		process.env.USER_FILES_BUCKET_NAME = process.env.AWS_S3_USER_FILES_BUCKET_NAME;
+		process.env.TEMPLATE_FILES_BUCKET_NAME = process.env.AWS_S3_TEMPLATE_FILES_BUCKET_NAME;
+		process.env.PUBLIC_FILES_BUCKET_NAME = process.env.AWS_S3_PUBLIC_FILES_BUCKET_NAME;
 	} else {
-		process.env['BACKEND'] = "fs";
-		process.env['USER_FILES_BUCKET_NAME'] = Path.resolve(__dirname + "/../user_files");
-		process.env['TEMPLATE_FILES_BUCKET_NAME'] = Path.resolve(__dirname + "/../template_files");
-		process.env['PUBLIC_FILES_BUCKET_NAME'] = Path.resolve(__dirname + "/../public_files");
+		process.env.BACKEND = "fs";
+		process.env.USER_FILES_BUCKET_NAME = Path.resolve(__dirname + "/../user_files");
+		process.env.TEMPLATE_FILES_BUCKET_NAME = Path.resolve(__dirname + "/../template_files");
+		process.env.PUBLIC_FILES_BUCKET_NAME = Path.resolve(__dirname + "/../public_files");
 	}
 }
 
@@ -33,7 +38,7 @@ const settings = {
 	internal: {
 		filestore: {
 			port: 3009,
-			host: process.env['LISTEN_ADDRESS'] || "localhost"
+			host: process.env.LISTEN_ADDRESS || "localhost"
 		}
 	},
 
@@ -43,50 +48,50 @@ const settings = {
 		// s3 - Amazon S3
 		// fs - local filesystem
 		// gcs - Google Cloud Storage
-		backend: process.env['BACKEND'],
+		backend: process.env.BACKEND,
 
 		gcs: {
 			endpoint:
-				process.env['GCS_API_ENDPOINT'] ?{
-					apiEndpoint: process.env['GCS_API_ENDPOINT'],
-					apiScheme: process.env['GCS_API_SCHEME'],
-					projectId: process.env['GCS_PROJECT_ID']
+				process.env.GCS_API_ENDPOINT ?{
+					apiEndpoint: process.env.GCS_API_ENDPOINT,
+					apiScheme: process.env.GCS_API_SCHEME,
+					projectId: process.env.GCS_PROJECT_ID
 				} : undefined,
-			unlockBeforeDelete: process.env['GCS_UNLOCK_BEFORE_DELETE'] === "true",  // unlock an event-based hold before deleting. default false
-			deletedBucketSuffix: process.env['GCS_DELETED_BUCKET_SUFFIX'],          // if present, copy file to another bucket on delete. default null
-			deleteConcurrency: parseInt(process.env['GCS_DELETE_CONCURRENCY']) || 50,
-			signedUrlExpiryInMs: parseInt(process.env['LINK_EXPIRY_TIMEOUT'] || 60000)
+			unlockBeforeDelete: process.env.GCS_UNLOCK_BEFORE_DELETE === "true",  // unlock an event-based hold before deleting. default false
+			deletedBucketSuffix: process.env.GCS_DELETED_BUCKET_SUFFIX,          // if present, copy file to another bucket on delete. default null
+			deleteConcurrency: parseInt(process.env.GCS_DELETE_CONCURRENCY) || 50,
+			signedUrlExpiryInMs: parseInt(process.env.LINK_EXPIRY_TIMEOUT || 60000)
 		},
 
 		s3:
-			(process.env['AWS_ACCESS_KEY_ID'] != null) || (process.env['S3_BUCKET_CREDENTIALS'] != null) ?{
-				key: process.env['AWS_ACCESS_KEY_ID'],
-				secret: process.env['AWS_SECRET_ACCESS_KEY'],
-				endpoint: process.env['AWS_S3_ENDPOINT'],
-				pathStyle: process.env['AWS_S3_PATH_STYLE'],
-				partSize: process.env['AWS_S3_PARTSIZE'] || (100 * 1024 * 1024),
-				bucketCreds: ((process.env['S3_BUCKET_CREDENTIALS'] != null) ? JSON.parse(process.env['S3_BUCKET_CREDENTIALS']) : undefined)
+			(process.env.AWS_ACCESS_KEY_ID != null) || (process.env.S3_BUCKET_CREDENTIALS != null) ?{
+				key: process.env.AWS_ACCESS_KEY_ID,
+				secret: process.env.AWS_SECRET_ACCESS_KEY,
+				endpoint: process.env.AWS_S3_ENDPOINT,
+				pathStyle: process.env.AWS_S3_PATH_STYLE,
+				partSize: process.env.AWS_S3_PARTSIZE || (100 * 1024 * 1024),
+				bucketCreds: ((process.env.S3_BUCKET_CREDENTIALS != null) ? JSON.parse(process.env.S3_BUCKET_CREDENTIALS) : undefined)
 			} : undefined,
 
 		// GCS should be configured by the service account on the kubernetes pod. See GOOGLE_APPLICATION_CREDENTIALS,
 		// which will be picked up automatically.
 
 		stores: {
-			user_files: process.env['USER_FILES_BUCKET_NAME'],
-			template_files: process.env['TEMPLATE_FILES_BUCKET_NAME'],
-			public_files: process.env['PUBLIC_FILES_BUCKET_NAME']
+			user_files: process.env.USER_FILES_BUCKET_NAME,
+			template_files: process.env.TEMPLATE_FILES_BUCKET_NAME,
+			public_files: process.env.PUBLIC_FILES_BUCKET_NAME
 		},
 
 		fallback:
-			(process.env['FALLBACK_BACKEND'] != null) ?{
-				backend: process.env['FALLBACK_BACKEND'],
+			(process.env.FALLBACK_BACKEND != null) ?{
+				backend: process.env.FALLBACK_BACKEND,
 				// mapping of bucket names on the fallback, to bucket names on the primary.
 				// e.g. { myS3UserFilesBucketName: 'myGoogleUserFilesBucketName' }
-				buckets: JSON.parse(process.env['FALLBACK_BUCKET_MAPPING'] || '{}'),
-				copyOnMiss: process.env['COPY_ON_MISS'] === 'true'
+				buckets: JSON.parse(process.env.FALLBACK_BUCKET_MAPPING || '{}'),
+				copyOnMiss: process.env.COPY_ON_MISS === 'true'
 			} : undefined,
 
-		allowRedirects: process.env['ALLOW_REDIRECTS'] === 'true' ? true : false
+		allowRedirects: process.env.ALLOW_REDIRECTS === 'true'
 	},
 
 	path: {
@@ -98,7 +103,7 @@ const settings = {
 		convertCommandPrefix: []
 	},
 
-	enableConversions: process.env['ENABLE_CONVERSIONS'] === 'true' ? true : false,
+	enableConversions: process.env.ENABLE_CONVERSIONS === 'true',
 
 	sentry: {
 		dsn: process.env.SENTRY_DSN
@@ -108,10 +113,10 @@ const settings = {
 // Filestore health check
 // ----------------------
 // Project and file details to check in persistor when calling /health_check
-if ((process.env['HEALTH_CHECK_PROJECT_ID'] != null) && (process.env['HEALTH_CHECK_FILE_ID'] != null)) {
+if ((process.env.HEALTH_CHECK_PROJECT_ID != null) && (process.env.HEALTH_CHECK_FILE_ID != null)) {
 	settings.health_check = {
-		project_id: process.env['HEALTH_CHECK_PROJECT_ID'],
-		file_id: process.env['HEALTH_CHECK_FILE_ID']
+		project_id: process.env.HEALTH_CHECK_PROJECT_ID,
+		file_id: process.env.HEALTH_CHECK_FILE_ID
 	};
 }