make all responses from /api json

app.py

@@ -1,5 +1,5 @@
 from typing import Any, Mapping
-from flask import Flask, render_template, send_file, Response
+from flask import Flask, render_template, send_file, jsonify
 import os
 import subprocess
 import signal
@@ -125,24 +125,24 @@ def filemgr(path=""):
 @app.route("/api/start", methods=["POST"])
 def api_start():
     if is_playing():
-        return Response("Laas is already lofi'ing", 400)
+        return jsonify("Laas is already lofi'ing"), 400
     else:
         playback_start()
-        return Response("ok", 200)
+        return jsonify('ok'), 200
 
 
 @app.route("/api/stop", methods=["POST"])
 def api_stop():
     if not is_playing():
-        return Response("You cant stop when theres no playback, womp womp!", 400)
+        return jsonify("You cant stop when theres no playback, womp womp!"), 400
     else:
         playback_stop()
-        return Response("ok", 200)
+        return jsonify('ok'), 200
 
 
 @app.route("/api/status", methods=["GET"])
 def api_status():
-    return Response(str(is_playing()).lower(), headers={"Content-Type": "text/json"})
+    return jsonify(is_playing())
 
 
 @app.route("/api/nowplaying", methods=["GET"])
@@ -181,7 +181,7 @@ def api_nowplaying():
             reply_json: Mapping[str, Any] = json.loads(reply.decode())
             response[key] = reply_json["data"] if "data" in reply_json else "Unknown"
 
-    return Response(json.dumps(response), headers={"Content-Type": "text/json"})
+    return jsonify(response)
 
 
 signal.signal(signal.SIGTERM, sigh)