set label on the redis container

this ensures that redis is stopped when app is stopped and also
helps identifying app related containers easily

src/addons.js

@@ -644,8 +644,9 @@ function setupRedis(app, options, callback) {
     }
 
     const tag = infra.images.redis.tag, redisName = 'redis-' + app.id;
+    // note that we do not add appId label because this interferes with the stop/start app logic
     const cmd = `docker run --restart=always -d --name=${redisName} \
-                --label=appId=${app.id} --label=location=${app.location} \
+                --label=location=${app.location} \
                 --net cloudron \
                 --net-alias ${redisName} \
                 -m ${memoryLimit/2} \

src/apptask.js

@@ -131,7 +131,7 @@ function deleteContainers(app, callback) {
     assert.strictEqual(typeof app, 'object');
     assert.strictEqual(typeof callback, 'function');
 
-    debugApp(app, 'deleting containers');
+    debugApp(app, 'deleting app containers (app, scheduler)');
 
     docker.deleteContainers(app.id, function (error) {
         if (error) return callback(new Error('Error deleting container: ' + error));