diff --git a/.dockerignore b/.dockerignore
new file mode 100644
index 0000000..8c24b79
--- /dev/null
+++ b/.dockerignore
@@ -0,0 +1,25 @@
+# Git
+.git
+.github
+.githooks
+.gitignore
+
+# Local environment and secrets
+.venv
+.env
+
+# Python cache and test cache
+__pycache__
+.pytest_cache
+.ruff_cache
+.mypy_cache
+.coverage
+htmlcov
+
+# Build artifacts
+dist
+build
+*.egg-info
+
+# Project docs not needed for the test image
+docs
\ No newline at end of file
diff --git a/README.md b/README.md
index 607f0d0..213fe1d 100644
--- a/README.md
+++ b/README.md
@@ -120,7 +120,7 @@ README.md
 - Tkinter
 - pytest
 
-### Current data source
+### Current data sources
 
 - ExchangeRate API for live currency conversion
 - yfinance for historical market-data retrieval and analytics
@@ -140,8 +140,6 @@ Planned or likely future technologies include:
 
 ### Data processing
 
-- pandas
-- NumPy
 - possibly Polars later for larger datasets
 
 ### Storage
@@ -153,14 +151,10 @@ Planned or likely future technologies include:
 
 ### Visualization and UI
 
-- matplotlib
-- Plotly
 - NiceGUI
 
 ### DevOps and deployment
 
-- GitHub Actions
-- Docker
 - Docker Compose
 - cloud deployment later
 
@@ -199,6 +193,7 @@ Recommended for development:
 - VS Code
 - a virtual environment
 - pytest
+- Docker, if you want to run tests in an isolated container environment
 
 > [!NOTE]
 > Runtime dependencies are managed through `pyproject.toml`.
@@ -254,7 +249,7 @@ pip install -e ".[dev]"
 
 ## API Key Setup
 
-ARGUS currently uses the ExchangeRate API for live currency conversion.
+ARGUS uses the ExchangeRate API for live currency conversion. Historical analytics currently use yfinance and do not require an additional API key.
 
 ### 1. Create an API key
 
@@ -284,7 +279,7 @@ The `.env` file must stay local and should never be committed.
 
 ---
 
-## Running ARGUS
+## Running ARGUS Locally
 
 Start the current Tkinter GUI:
 
@@ -294,6 +289,22 @@ python -m argus.main
 
 This starts the local ARGUS prototype with calculator, currency conversion and basic analytics views.
 
+## Running Argus in Docker
+
+ARGUS includes a minimal Docker setup for running the test suite in an isolated container environment.
+
+Build the Docker image:
+
+```bash
+docker build -t argus .
+```
+
+Run ARGUS in a container:
+
+```bash
+docker run --rm argus
+```
+
 ### Legacy CLI / Debug Interface
 
 The legacy CLI is still available for quick local checks and debugging:
@@ -310,7 +321,7 @@ python src/legacy/debug_main.py
 
 ## Running Tests
 
-Run the test suite:
+Run the test suite locally:
 
 ```bash
 pytest
diff --git a/dockerfile b/dockerfile
new file mode 100644
index 0000000..1dce2e8
--- /dev/null
+++ b/dockerfile
@@ -0,0 +1,12 @@
+FROM python:3.11-slim
+
+WORKDIR /app
+
+COPY pyproject.toml README.md ./
+COPY src/ ./src/
+COPY tests/ ./tests/
+
+RUN python -m pip install --upgrade pip \
+    && pip install -e ".[dev]"
+
+CMD ["pytest"]
\ No newline at end of file