Add ESLint (#941)

* Add eslint, switch to lint-staged for precommit

* Fix all ESLint errors

* Update GH workflow to check prettier and eslint

1 files changed, 4 insertions, 4 deletions

diff --git a/src/cdn/util/FileStorage.ts b/src/cdn/util/FileStorage.ts

index c8473e30..ee087c85 100644
--- a/src/cdn/util/FileStorage.ts
+++ b/src/cdn/util/FileStorage.ts
@@ -28,7 +28,7 @@ import ExifTransformer from "exif-be-gone";
 function getPath(path: string) {
 	// STORAGE_LOCATION has a default value in start.ts
 	const root = process.env.STORAGE_LOCATION || "../";
-	var filename = join(root, path);
+	const filename = join(root, path);
 
 	if (path.indexOf("\0") !== -1 || !filename.startsWith(root))
 		throw new Error("invalid path");
@@ -51,15 +51,15 @@ export class FileStorage implements Storage {
 		}
 	}
 
-	async set(path: string, value: any) {
+	async set(path: string, value: Buffer) {
 		path = getPath(path);
 		if (!fs.existsSync(dirname(path)))
 			fs.mkdirSync(dirname(path), { recursive: true });
 
-		value = Readable.from(value);
+		const ret = Readable.from(value);
 		const cleaned_file = fs.createWriteStream(path);
 
-		return value.pipe(new ExifTransformer()).pipe(cleaned_file);
+		ret.pipe(new ExifTransformer()).pipe(cleaned_file);
 	}
 
 	async delete(path: string) {