diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..2bf6443
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,12 @@
+FROM python:3.11-slim
+
+WORKDIR /app
+
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY app/ ./app/
+
+EXPOSE 8000
+
+CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000"]
diff --git a/RUNNING.md b/RUNNING.md
index 77896cf..7c69da4 100644
--- a/RUNNING.md
+++ b/RUNNING.md
@@ -1,33 +1,52 @@
-# Running the Todo API
+# Running the Application
+
+## TEAM_BRIEF
+stack: Python/FastAPI
+test_runner: pytest tests/
+lint_tool: ruff check .
+coverage_tool: pytest-cov
+coverage_threshold: 70
+coverage_applies: true
 
 ## Prerequisites
 
-- Python 3.10 or later
+- Python 3.11+
+- Docker and Docker Compose (optional, for containerised usage)
+
+## Local Development
 
-## Install dependencies
+### Install dependencies
 
 ```bash
-pip install fastapi uvicorn pydantic
+pip install -r requirements.txt
 ```
 
-For running the test suite you will also need:
+### Run the application
 
 ```bash
-pip install httpx pytest
+uvicorn app.main:app --host 0.0.0.0 --port 8000
 ```
 
-## Start the server
+Open http://localhost:8000/health to verify the service is running.
+
+### Run the tests
 
 ```bash
-uvicorn main:app --reload --host 0.0.0.0 --port 8000
+pytest tests/
 ```
 
-The API will be available at <http://localhost:8000>.
+## Docker
 
-Interactive docs are served at <http://localhost:8000/docs>.
+### Build and run
 
-## Run the tests
+```bash
+docker compose up --build
+```
+
+The API will be available at http://localhost:8000/health.
+
+### Stop
 
 ```bash
-pytest tests/
+docker compose down
 ```
diff --git a/app/__init__.py b/app/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/app/main.py b/app/main.py
new file mode 100644
index 0000000..0947ef1
--- /dev/null
+++ b/app/main.py
@@ -0,0 +1,24 @@
+"""FastAPI application entry point.
+
+Creates the FastAPI app instance and defines the /health endpoint.
+"""
+
+from __future__ import annotations
+
+from fastapi import FastAPI
+
+app = FastAPI(
+    title="Todo API",
+    description="A simple Todo REST API with in-memory storage.",
+    version="1.0.0",
+)
+
+
+@app.get("/health", tags=["health"])
+async def health() -> dict:
+    """Return a simple health-check response.
+
+    Returns:
+        A JSON object with a single key ``status`` set to ``"ok"``.
+    """
+    return {"status": "ok"}
diff --git a/conftest.py b/conftest.py
index 2cb6af4..90c35d1 100644
--- a/conftest.py
+++ b/conftest.py
@@ -2,11 +2,17 @@
 
 Registers the --timeout option so that pytest does not fail with
 'unrecognized arguments' when pytest-timeout is not installed.
+Also ensures the project root is on sys.path for imports.
 """
 
 import sys
 from pathlib import Path
 
+# Ensure the project root is importable
+_PROJECT_ROOT = str(Path(__file__).resolve().parent)
+if _PROJECT_ROOT not in sys.path:
+    sys.path.insert(0, _PROJECT_ROOT)
+
 
 def pytest_addoption(parser):
     """Register --timeout so pytest doesn't choke when the plugin is absent."""
diff --git a/docker-compose.yml b/docker-compose.yml
new file mode 100644
index 0000000..821d084
--- /dev/null
+++ b/docker-compose.yml
@@ -0,0 +1,8 @@
+version: "3.9"
+
+services:
+  api:
+    build: .
+    ports:
+      - "8000:8000"
+    restart: unless-stopped
diff --git a/main.py b/main.py
index 2e8fbda..52a885c 100644
--- a/main.py
+++ b/main.py
@@ -1,6 +1,7 @@
 """FastAPI application entry point.
 
 Creates the FastAPI app and mounts the Todo CRUD router.
+Also re-exports the /health endpoint from app.main.
 """
 
 from __future__ import annotations
@@ -22,3 +23,13 @@
 async def root() -> dict:
     """Return a welcome message at the API root."""
     return {"message": "Welcome to the Todo API"}
+
+
+@app.get("/health", tags=["health"])
+async def health() -> dict:
+    """Return a simple health-check response.
+
+    Returns:
+        A JSON object with a single key ``status`` set to ``"ok"``.
+    """
+    return {"status": "ok"}
diff --git a/requirements.txt b/requirements.txt
index 5a6ebf7..3a4da97 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,4 @@
-fastapi>=0.100.0
-uvicorn>=0.23.0
-pydantic>=2.0.0
-pytest>=7.0.0
-pytest-timeout>=2.1.0
-httpx>=0.24.0
+fastapi>=0.115.0
+uvicorn[standard]>=0.30.0
+pytest>=8.0.0
+httpx>=0.27.0
diff --git a/tests/test_health.py b/tests/test_health.py
new file mode 100644
index 0000000..ca3e84e
--- /dev/null
+++ b/tests/test_health.py
@@ -0,0 +1,55 @@
+"""Test suite for the /health endpoint.
+
+Verifies that the GET /health endpoint returns HTTP 200 with the
+expected JSON body {"status": "ok"}.
+"""
+
+from __future__ import annotations
+
+from fastapi.testclient import TestClient
+
+from app.main import app
+
+client: TestClient = TestClient(app)
+
+
+def test_health_returns_200() -> None:
+    """GET /health must return HTTP 200 status code."""
+    response = client.get("/health")
+    assert response.status_code == 200
+
+
+def test_health_returns_correct_json() -> None:
+    """GET /health must return JSON body {"status": "ok"}."""
+    response = client.get("/health")
+    assert response.json() == {"status": "ok"}
+
+
+def test_health_content_type_is_json() -> None:
+    """GET /health must return application/json content type."""
+    response = client.get("/health")
+    assert "application/json" in response.headers["content-type"]
+
+
+def test_health_post_method_not_allowed() -> None:
+    """POST /health must return 405 Method Not Allowed."""
+    response = client.post("/health")
+    assert response.status_code == 405
+
+
+def test_health_put_method_not_allowed() -> None:
+    """PUT /health must return 405 Method Not Allowed."""
+    response = client.put("/health")
+    assert response.status_code == 405
+
+
+def test_health_delete_method_not_allowed() -> None:
+    """DELETE /health must return 405 Method Not Allowed."""
+    response = client.delete("/health")
+    assert response.status_code == 405
+
+
+def test_health_patch_method_not_allowed() -> None:
+    """PATCH /health must return 405 Method Not Allowed."""
+    response = client.patch("/health")
+    assert response.status_code == 405