feat: backend folder

backend/.env.example

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+# General settings
+PROJECT_NAME=
+API_PREFIX=
+SECRET_KEY=
+ACCESS_TOKEN_EXPIRE_MINUTES=11520
+
+# CORS Origins
+FRONTEND_HOST=http://localhost:3000
+
+# Environment and logging
+ENVIRONMENT=local               # Options: local, staging, production
+LOG_LEVEL=DEBUG                 # Options: DEBUG, INFO, ERROR, WARNING
+SENTRY_DSN=                     # Add your Sentry DSN if available
+
+# Database configuration
+POSTGRES_SERVER=localhost
+POSTGRES_PORT=5432
+POSTGRES_USER=user
+POSTGRES_PASSWORD=password
+POSTGRES_DB=app_database
+
+# LLM Configuration
+LLM_TEMPERATURE=0.5
+LLM_MAX_TOKENS=
+EMBEDDING_DIM=1024
+
+# OpenAI Configuration
+LLM_OPENAI_MODEL=
+OPENAI_API_KEY=
+
+# Optional Worker Configuration
+UVICORN_WORKER_COUNT=

backend/.flake8

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+[flake8]
+max-line-length = 88
+exclude = .venv,.git,__pycache__,build,dist

backend/.gitignore

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+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+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
+
+# poetry
+#   Similar to Pipfile.lock, it is generally recommended to include poetry.lock in version control.
+#   This is especially recommended for binary packages to ensure reproducibility, and is more
+#   commonly ignored for libraries.
+#   https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control
+#poetry.lock
+
+# pdm
+#   Similar to Pipfile.lock, it is generally recommended to include pdm.lock in version control.
+#pdm.lock
+#   pdm stores project-wide configurations in .pdm.toml, but it is recommended to not include it
+#   in version control.
+#   https://pdm.fming.dev/latest/usage/project/#working-with-version-control
+.pdm.toml
+.pdm-python
+.pdm-build/
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow and github.com/pdm-project/pdm
+__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/
+
+# PyCharm
+#  JetBrains specific template is maintained in a separate JetBrains.gitignore that can
+#  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
+#  and can be added to the global gitignore or merged into this file.  For a more nuclear
+#  option (not recommended) you can uncomment the following to ignore the entire idea folder.
+#.idea/
+.python-version
+/qdrant_storage
+/data/dev-test-*.txt

backend/Dockerfile

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+# Use a slim Python image for smaller size
+FROM python:3.11.3-slim-bullseye
+
+# Set environment variables for non-buffered output and working directory
+ENV PYTHONUNBUFFERED=1 \
+    APP_HOME=/app
+
+WORKDIR $APP_HOME
+
+# Install system dependencies in one step
+RUN apt-get update --no-cache && \
+    apt-get install -y --no-install-recommends \
+        libpq-dev \
+        gcc \
+        build-essential \
+        wkhtmltopdf && \
+    rm -rf /var/lib/apt/lists/*  # Clean up APT cache
+
+# Install Poetry
+RUN pip install --no-cache-dir poetry
+
+# Copy dependency files first for better caching
+COPY pyproject.toml poetry.lock ./
+
+# Install dependencies using Poetry
+RUN poetry install --no-root --no-interaction --no-ansi
+
+# Copy the rest of the application
+COPY . .
+
+ENV OPENAI_API_KEY=${OPENAI_API_KEY}
+
+CMD ["poetry", "run", "start"]

backend/LINT.md

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+# Format code
+black qllm example tests
+
+# Check import order
+isort --check-only qllm example tests
+
+# Fix import order
+isort qllm example tests
+
+# Lint with Flake8
+flake8 qllm example tests
+
+# Type-check with Mypy
+mypy qllm example

backend/example/dev.py

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+from qllm.models import Base
+
+print("All table: ", Base.metadata.tables)