♻️ Refactor backend, settings, DB sessions, types, configs, plugins (#158)

* ♻️ Refactor backend, update DB session handling

* ✨ Add mypy config and plugins

* ➕ Use Python-jose instead of PyJWT

as it has some extra functionalities and features

* ✨ Add/update scripts for test, lint, format

* 🔧 Update lint and format configs

* 🎨 Update import format, comments, and types

* 🎨 Add types to config

* ✨ Add types for all the code, and small fixes

* 🎨 Use global imports to simplify exploring with Jupyter

* ♻️ Import schemas and models, instead of each class

* 🚚 Rename db_session to db for simplicity

* 📌 Update dependencies installation for testing

{{cookiecutter.project_slug}}/docker-compose.yml

@@ -115,6 +115,8 @@ services:
     build:
       context: ./backend
       dockerfile: backend.dockerfile
+      args:
+        INSTALL_DEV: ${INSTALL_DEV-false}
     deploy:
       labels:
         - traefik.frontend.rule=PathPrefix:/api,/docs,/redoc
@@ -137,6 +139,8 @@ services:
     build:
       context: ./backend
       dockerfile: celeryworker.dockerfile
+      args:
+        INSTALL_DEV: ${INSTALL_DEV-false}
   
   frontend:
     image: '${DOCKER_IMAGE_FRONTEND}:${TAG-latest}'