diff --git a/.devcontainer/Dockerfile b/.devcontainer/Dockerfile
index f1787ef..db99378 100644
--- a/.devcontainer/Dockerfile
+++ b/.devcontainer/Dockerfile
@@ -1,18 +1,50 @@
 # https://github.com/devcontainers/images/tree/main/src/python
-FROM mcr.microsoft.com/devcontainers/python:1-3.12-bookworm
+#FROM mcr.microsoft.com/devcontainers/python:1-3.13-bookworm
+FROM python:3.13-slim-bookworm
+
+# https://code.visualstudio.com/remote/advancedcontainers/add-nonroot-user
+ARG USERNAME=vscode
+ARG USER_UID=1000
+ARG USER_GID=$USER_UID
+
+# Create the user
+RUN groupadd --gid $USER_GID $USERNAME \
+    && useradd --uid $USER_UID --gid $USER_GID -m $USERNAME --shell /bin/bash \
+    # [Optional] Add sudo support. Omit if you don't need to install software after connecting.
+    && apt-get update \
+    && apt-get install -y sudo \
+    && echo $USERNAME ALL=\(root\) NOPASSWD:ALL > /etc/sudoers.d/$USERNAME \
+    && chmod 0440 /etc/sudoers.d/$USERNAME
 
 # Install additional packages.
-# RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
-#    && apt-get -y install --no-install-recommends \
-#       <your-package-list-here> \
-#    && apt-get autoremove -y && apt-get clean -y && rm -rf /var/lib/apt/lists/*
+RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
+    && apt-get -y install --no-install-recommends \
+    git \
+    make \
+    openssh-client \
+    && apt-get autoremove -y && apt-get clean -y && rm -rf /var/lib/apt/lists/*
+
+# Install the project into `/app`
+WORKDIR /app
+
+# Enable bytecode compilation
+ENV UV_COMPILE_BYTECODE=1 \
+    UV_LINK_MODE=copy
 
 # Install UV / UVX
 COPY --from=ghcr.io/astral-sh/uv:latest /uv /uvx /bin/
-ENV UV_COMPILE_BYTECODE=1
-ENV UV_LINK_MODE=copy
 
 # Install project dependencies
-RUN --mount=type=bind,source=pyproject.toml,target=pyproject.toml \
-    --mount=type=bind,source=uv.lock,target=uv.lock \
-    uv sync --frozen --no-install-project --all-extras
+COPY pyproject.toml uv.lock ./
+RUN uv sync --frozen --no-install-project --all-groups \
+    && rm pyproject.toml uv.lock \
+    && chown -R $USERNAME:$USERNAME /app
+
+# Place executables in the environment at the front of the path
+ENV PATH="/app/.venv/bin:$PATH"
+
+# HACK: https://github.com/sphinx-doc/sphinx/issues/11739
+ENV LC_ALL=C.UTF-8
+
+# [Optional] Set the default user. Omit if you want to keep the default as root.
+USER $USERNAME
diff --git a/.dockerignore b/.dockerignore
new file mode 100644
index 0000000..ebe2148
--- /dev/null
+++ b/.dockerignore
@@ -0,0 +1,2 @@
+# Exclude the project virtual environment from image builds
+.venv
\ No newline at end of file
diff --git a/.github/workflows/docker-build-publish.yml b/.github/workflows/docker-build-publish.yml
index 69734ab..3559b42 100644
--- a/.github/workflows/docker-build-publish.yml
+++ b/.github/workflows/docker-build-publish.yml
@@ -5,16 +5,16 @@ on:
     branches:
       - main
     paths:
-      - Pipfile
-      - Pipfile.lock
       - .devcontainer/Dockerfile
+      - pyproject.toml
+      - uv.lock
   pull_request:
     branches:
       - main
     paths:
-      - Pipfile
-      - Pipfile.lock
       - .devcontainer/Dockerfile
+      - pyproject.toml
+      - uv.lock
   workflow_dispatch:
 
 jobs:
diff --git a/pyproject.toml b/pyproject.toml
index da77cf6..22c064f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,8 +9,8 @@ build-backend = "setuptools.build_meta"
 [project]
 name = "python_training_project"
 authors = [
-    {name = "Andreas", email = "andreas@devminds.ch"},
-    {name = "Thomas", email = "thomas@devminds.ch"},
+    {name = "Andreas Nussberger", email = "andreas@devminds.ch"},
+    {name = "Thomas Keller", email = "thomas@devminds.ch"},
 ]
 description = "Python Training Project by devminds GmbH"
 readme = "README.md"
@@ -33,8 +33,8 @@ dynamic = ["version"]
 [project.scripts]
 python_training_project = "python_training_project.__main__:cli"
 
-[tool.uv]
-dev-dependencies = [
+[dependency-groups]
+dev = [
     "coverage",
     "flake8",
     "mypy",
@@ -54,6 +54,9 @@ write_to = "src/python_training_project/version.py"
 [tool.pytest.ini_options]
 minversion = "6.0"
 addopts = "--cov --cov-report term --cov-report xml --junitxml=build/test-report.xml"
+pythonpath = [
+  "src",
+]
 testpaths = [
     "tests",
 ]
@@ -79,3 +82,8 @@ include = [
     "tests/**/*.py"
 ]
 output-format = "pylint"
+
+[tool.pylint.main]
+ignore = [
+    "version.py"
+]
diff --git a/src/python_training_project/__main__.py b/src/python_training_project/__main__.py
index a3cc794..b374114 100644
--- a/src/python_training_project/__main__.py
+++ b/src/python_training_project/__main__.py
@@ -7,7 +7,7 @@
 
 import click
 
-from python_training_project.calculate import sum
+from python_training_project.calculate import calc_sum
 
 log = logging.getLogger(__name__)
 
@@ -28,7 +28,7 @@ def cli():
 @click.argument("b", type=float)
 def cli_sum(a: float, b: float):
     """Show the sum of two numbers on the console."""
-    log.info("Sum of %f and %f is %f", a, b, sum(a, b))
+    log.info("Sum of %f and %f is %f", a, b, calc_sum(a, b))
 
 
 if __name__ == "__main__":
diff --git a/src/python_training_project/calculate.py b/src/python_training_project/calculate.py
index 38e024d..f85432e 100644
--- a/src/python_training_project/calculate.py
+++ b/src/python_training_project/calculate.py
@@ -3,7 +3,7 @@
 """
 
 
-def sum(a: float, b: float) -> float:
+def calc_sum(a: float, b: float) -> float:
     """Calculate the sum of two numbers."""
     return a + b
 
diff --git a/tests/test_calculate.py b/tests/test_calculate.py
index 5ebefb7..e18c5b1 100644
--- a/tests/test_calculate.py
+++ b/tests/test_calculate.py
@@ -1,13 +1,13 @@
-from python_training_project.calculate import sum
+from python_training_project.calculate import calc_sum
 
 
-def test_sum():
-    assert sum(1, 1) == 2
-    assert sum(2, 1) == 3
-    assert sum(1, 2) == 3
+def test_calc_sum():
+    assert calc_sum(1, 1) == 2
+    assert calc_sum(2, 1) == 3
+    assert calc_sum(1, 2) == 3
 
 
 def test_sum_negative():
-    assert sum(1, -1) == 0
-    assert sum(-1, 1) == 0
-    assert sum(-1, -1) == -2
+    assert calc_sum(1, -1) == 0
+    assert calc_sum(-1, 1) == 0
+    assert calc_sum(-1, -1) == -2
diff --git a/tools/build-docs.sh b/tools/build-docs.sh
index 0ec04a9..b4cc9ae 100755
--- a/tools/build-docs.sh
+++ b/tools/build-docs.sh
@@ -8,6 +8,6 @@ pushd "${REPO_ROOT}" 2>&1 > /dev/null
 echo "Building documentation..."
 mkdir -p build
 cd docs
-uv run --all-extras make html
+make html
 
 popd 2>&1 > /dev/null
diff --git a/tools/lint-package.sh b/tools/lint-package.sh
index ada8352..ce76b9d 100755
--- a/tools/lint-package.sh
+++ b/tools/lint-package.sh
@@ -11,31 +11,31 @@ STATUS=0
 set +e
 
 echo "Running flake8..."
-uv run --all-extras flake8 src/python_training_project --format=pylint > build/flake8.txt
+flake8 src/python_training_project --format=pylint > build/flake8.txt
 if [ $? -ne 0 ]; then
     STATUS=1
 fi
 
 echo "Running mypy..."
-uv run --all-extras mypy src/python_training_project > build/mypy.txt
+mypy src/python_training_project > build/mypy.txt
 if [ $? -ne 0 ]; then
     STATUS=1
 fi
 
 echo "Running pylint..."
-uv run --all-extras pylint src/python_training_project --msg-template="{path}:{line}: [{msg_id}, {obj}] {msg} ({symbol})" > build/pylint.txt
+pylint src/python_training_project --msg-template="{path}:{line}: [{msg_id}, {obj}] {msg} ({symbol})" > build/pylint.txt
 if [ $? -ne 0 ]; then
     STATUS=1
 fi
 
 echo "Running ruff check..."
-uv run --all-extras ruff check > build/ruff.txt
+ruff check > build/ruff.txt
 if [ $? -ne 0 ]; then
     STATUS=1
 fi
 
 echo "Running ruff format..."
-uv run --all-extras ruff format --check
+ruff format --check
 if [ $? -ne 0 ]; then
     STATUS=1
 fi
diff --git a/tools/test-package.sh b/tools/test-package.sh
index 1b00b41..df59698 100755
--- a/tools/test-package.sh
+++ b/tools/test-package.sh
@@ -8,6 +8,6 @@ pushd "${REPO_ROOT}" 2>&1 > /dev/null
 mkdir -p build
 
 echo "Running tests..."
-uv run --all-extras pytest
+pytest
 
 popd 2>&1 > /dev/null
diff --git a/uv.lock b/uv.lock
index 2abbb11..2c92a16 100644
--- a/uv.lock
+++ b/uv.lock
@@ -119,7 +119,7 @@ name = "click"
 version = "8.1.7"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
-    { name = "colorama", marker = "platform_system == 'Windows'" },
+    { name = "colorama", marker = "sys_platform == 'win32'" },
 ]
 sdist = { url = "https://files.pythonhosted.org/packages/96/d3/f04c7bfcf5c1862a2a5b845c6b2b360488cf47af55dfa79c98f6a6bf98b5/click-8.1.7.tar.gz", hash = "sha256:ca9853ad459e787e2192211578cc907e7594e294c7ccc834310722b41b9ca6de", size = 336121 }
 wheels = [
@@ -574,7 +574,6 @@ wheels = [
 
 [[package]]
 name = "python-training-project"
-version = "0.1.dev50+g3436a05.d20241101"
 source = { editable = "." }
 dependencies = [
     { name = "click" },