feat(Backend): ✨ add template backend

Backend/.dockerignore

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+### Python template
+
+deploy/
+.idea/
+.vscode/
+.git/
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+cover/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+.pybuilder/
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+#   For a library or package, you might want to ignore these files since the code is
+#   intended to run in multiple environments; otherwise, check them in:
+# .python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# pytype static type analyzer
+.pytype/
+
+# Cython debug symbols
+cython_debug/

Backend/.editorconfig

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+root = true
+
+[*]
+tab_width = 4
+end_of_line = lf
+max_line_length = 88
+ij_visual_guides = 88
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.{js,py,html}]
+charset = utf-8
+
+[*.md]
+trim_trailing_whitespace = false
+
+[*.{yml,yaml}]
+indent_style = space
+indent_size = 2
+
+[Makefile]
+indent_style = tab
+
+[.flake8]
+indent_style = space
+indent_size = 2
+
+[*.py]
+indent_style = space
+indent_size = 4
+ij_python_from_import_parentheses_force_if_multiline = true

Backend/.flake8

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+[flake8]
+max-complexity = 6
+inline-quotes = double
+max-line-length = 88
+extend-ignore = E203
+docstring_style=sphinx
+
+ignore =
+  ; Found `f` string
+  WPS305,
+  ; Missing docstring in public module
+  D100,
+  ; Missing docstring in magic method
+  D105,
+  ; Missing docstring in __init__
+  D107,
+  ; Found `__init__.py` module with logic
+  WPS412,
+  ; Found class without a base class
+  WPS306,
+  ; Missing docstring in public nested class
+  D106,
+  ; First line should be in imperative mood
+  D401,
+  ; Found wrong variable name
+  WPS110,
+  ; Found `__init__.py` module with logic
+  WPS326,
+  ; Found string constant over-use
+  WPS226,
+  ; Found upper-case constant in a class
+  WPS115,
+  ; Found nested function
+  WPS602,
+  ; Found method without arguments
+  WPS605,
+  ; Found overused expression
+  WPS204,
+  ; Found too many module members
+  WPS202,
+  ; Found too high module cognitive complexity
+  WPS232,
+  ; line break before binary operator
+  W503,
+  ; Found module with too many imports
+  WPS201,
+  ; Inline strong start-string without end-string.
+  RST210,
+  ; Found nested class
+  WPS431,
+  ; Found wrong module name
+  WPS100,
+  ; Found too many methods
+  WPS214,
+  ; Found too long ``try`` body
+  WPS229,
+  ; Found unpythonic getter or setter
+  WPS615,
+  ; Found a line that starts with a dot
+  WPS348,
+  ; Found complex default value (for dependency injection)
+  WPS404,
+  ;  not perform function calls in argument defaults (for dependency injection)
+  B008,
+  ; Model should define verbose_name in its Meta inner class
+  DJ10,
+  ; Model should define verbose_name_plural in its Meta inner class
+  DJ11,
+  ; Found mutable module constant.
+  WPS407,
+  ; Found too many empty lines in `def`
+  WPS473,
+  ; too many no-cover comments.
+  WPS403,
+
+per-file-ignores =
+  ; all tests
+  test_*.py,tests.py,tests_*.py,*/tests/*,conftest.py:
+  ; Use of assert detected
+  S101,
+  ; Found outer scope names shadowing
+  WPS442,
+  ; Found too many local variables
+  WPS210,
+  ; Found magic number
+  WPS432,
+  ; Missing parameter(s) in Docstring
+  DAR101,
+  ; Found too many arguments
+  WPS211,
+
+  ; all init files
+  __init__.py:
+  ; ignore not used imports
+  F401,
+  ; ignore import with wildcard
+  F403,
+  ; Found wrong metadata variable
+  WPS410,
+
+exclude =
+  ./.cache,
+  ./.git,
+  ./.idea,
+  ./.mypy_cache,
+  ./.pytest_cache,
+  ./.venv,
+  ./venv,
+  ./env,
+  ./cached_venv,
+  ./docs,
+  ./deploy,
+  ./var,
+  ./.vscode,
+  *migrations*,