Refactor/upgrade backend and frontend parts (#2)

* ♻️ Refactor and simplify backend code

* ♻️ Refactor frontend state, integrate typesafe-vuex accessors into state files

* ♻️ Use new state accessors and standardize layout

* 🔒 Upgrade and fix npm security audit

* 🔧 Update local re-generation scripts

* 🔊 Log startup exceptions to detect errors early

* ✏️ Fix password reset token content

* 🔥 Remove unneeded Dockerfile directives

* 🔥 Remove unnecessary print

* 🔥 Remove unnecessary code, upgrade dependencies in backend

* ✏️ Fix typos in docstrings and comments

* 🏗️ Improve user Depends utilities to simplify and remove code

* 🔥 Remove deprecated SQLAlchemy parameter

{{cookiecutter.project_slug}}/frontend/package.json

@@ -26,7 +26,7 @@
     "@vue/cli-plugin-babel": "^3.3.0",
     "@vue/cli-plugin-pwa": "^3.3.0",
     "@vue/cli-plugin-typescript": "^3.3.0",
-    "@vue/cli-plugin-unit-jest": "^3.3.0",
+    "@vue/cli-plugin-unit-jest": "^3.5.0",
     "@vue/cli-service": "^3.3.1",
     "@vue/test-utils": "^1.0.0-beta.28",
     "babel-core": "7.0.0-bridge.0",