Remove thumbnail generation on mobile app (#292)

* Remove thumbnail generation on mobile

* Remove tconditions for missing thumbnail on the backend

* Remove console.log

* Refactor queue systems

* Convert queue and processor name to constant

* Added corresponding interface to job queue

server/libs/job/tsconfig.lib.json

@@ -0,0 +1,9 @@
+{
+  "extends": "../../tsconfig.json",
+  "compilerOptions": {
+    "declaration": true,
+    "outDir": "../../dist/libs/job"
+  },
+  "include": ["src/**/*"],
+  "exclude": ["node_modules", "dist", "test", "**/*spec.ts"]
+}