allow screenshot from game as thumbnail header

backend/app/bl/GamesManager.js

@@ -1,3 +1,5 @@
+import sharp from 'sharp';
+sharp.cache({ files : 0 });
 
 const collection = 'games';
 /**
@@ -11,7 +13,7 @@ class GamesManager{
      * @param {App} app Class initializer, основна апликация
      */
     init(app){
-        const {db, am} = app;
+        const {db, am, config} = app;
 
         /**
          * Creates a new game definition, създаване на нова игрова дефиниция
@@ -69,6 +71,14 @@ class GamesManager{
                 project: { name:1, id:1, thumb: 1}
             });
         }
+
+        this.setHeader = async function(ctx, id, file){
+            await sharp(file.path).resize({height: 500}).webp({quality: 75}).toFile(`${config.fs.repo}/thumb/${id}.webp`);
+            await sharp(file.path).webp({quality: 75}).toFile(`${config.fs.repo}/default/${id}.webp`);
+            let object = await this.read(id);
+            object.thumb = id;
+            await this.update(ctx, object);
+        }
     }
 
     /**