diff --git a/.flake8 b/.flake8
new file mode 100644
index 0000000..3bb0c7e
--- /dev/null
+++ b/.flake8
@@ -0,0 +1,4 @@
+[flake8]
+max-line-length = 100
+exclude = .git,__pycache__,dist,*.egg-info,venv
+extend-ignore = E203
\ No newline at end of file
diff --git a/.gitignore b/.gitignore
index cd4609c..e3da943 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,42 @@
-env
+# Environment
+env/
 .env
+venv/
+ENV/
+
+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+.Python
+*.so
+.pytest_cache/
+.coverage
+.coverage.*
+coverage.xml
+*.cover
+htmlcov/
+
+# IDEs and editors
+.idea/
+.vscode/
+*.swp
+*.swo
+*~
+
+# Project specific
 test.py
-__pycache__
\ No newline at end of file
+*.log
+.pip-cache/
+
+# Temporary files
+*.tmp
+.DS_Store
+
+# Distribution / packaging
+dist/
+build/
+*.egg-info/
+
+# Docker
+.docker/
\ No newline at end of file
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
new file mode 100644
index 0000000..b546ea9
--- /dev/null
+++ b/.gitlab-ci.yml
@@ -0,0 +1,70 @@
+image: python:3.10-slim
+
+variables:
+  PIP_CACHE_DIR: "$CI_PROJECT_DIR/.pip-cache"
+  PYTHONPATH: "$CI_PROJECT_DIR"
+
+cache:
+  paths:
+    - .pip-cache
+    - venv/
+
+stages:
+  - setup
+  - lint
+  - test
+
+before_script:
+  - python --version
+  - pip install virtualenv
+  - virtualenv venv
+  - source venv/bin/activate
+
+setup:
+  stage: setup
+  script:
+    - pip install --no-cache-dir -r requirements.txt
+  artifacts:
+    paths:
+      - venv/
+    expire_in: 1 hour
+
+lint:
+  stage: lint
+  needs:
+    - setup
+  script:
+    - black --check app/ main.py tests/
+    - flake8 app/ main.py tests/ --max-line-length=100
+
+test:
+  stage: test
+  needs:
+    - setup
+  script:
+    # Run all tests
+    - pytest tests/ -v
+    # Start FastAPI server
+    - uvicorn main:app --host 0.0.0.0 --port 8000 &
+    # Wait for server to start
+    - sleep 10
+    # Test health endpoint
+    - |
+      RESPONSE=$(curl -s -o /dev/null -w "%{http_code}" http://localhost:8000/health)
+      if [ "$RESPONSE" = "200" ]; then
+        echo "✅ Health check passed"
+      else
+        echo "❌ Health check failed with status $RESPONSE"
+        exit 1
+      fi
+
+build:
+  stage: build
+  needs:
+    - test
+    - lint
+  script:
+    - docker build -t fact-check-api .
+  only:
+    - master
+    - dev
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
index f7bc893..459c6e9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,6 +6,7 @@ annotated-types==0.7.0
 anyio==4.7.0
 attrs==24.3.0
 beautifulsoup4==4.12.3
+black==24.10.0
 certifi==2024.12.14
 charset-normalizer==3.4.0
 click==8.1.7
@@ -13,14 +14,20 @@ dataclasses-json==0.6.7
 dnspython==2.7.0
 email_validator==2.2.0
 fastapi==0.115.6
+fastapi-cli==0.0.7
+flake8==7.1.1
 frozenlist==1.5.0
 greenlet==3.1.1
 gunicorn==23.0.0
 h11==0.14.0
 httpcore==1.0.7
+httptools==0.6.4
 httpx==0.28.1
 httpx-sse==0.4.0
 idna==3.10
+iniconfig==2.0.0
+itsdangerous==2.2.0
+Jinja2==3.1.4
 jsonpatch==1.33
 jsonpointer==3.0.0
 langchain==0.3.12
@@ -28,17 +35,29 @@ langchain-community==0.3.12
 langchain-core==0.3.25
 langchain-text-splitters==0.3.3
 langsmith==0.2.3
+markdown-it-py==3.0.0
+MarkupSafe==3.0.2
 marshmallow==3.23.1
+mccabe==0.7.0
+mdurl==0.1.2
 multidict==6.1.0
 mypy-extensions==1.0.0
 numpy==2.2.0
 openai==0.28.0
 orjson==3.10.12
 packaging==24.2
+pathspec==0.12.1
+platformdirs==4.3.6
+pluggy==1.5.0
 propcache==0.2.1
+pycodestyle==2.12.1
 pydantic==2.10.3
+pydantic-extra-types==2.10.1
 pydantic-settings==2.7.0
 pydantic_core==2.27.1
+pyflakes==3.2.0
+Pygments==2.18.0
+pytest==8.3.4
 python-dateutil==2.9.0.post0
 python-dotenv==1.0.1
 python-json-logger==3.2.1
@@ -46,6 +65,9 @@ python-multipart==0.0.20
 PyYAML==6.0.2
 requests==2.32.3
 requests-toolbelt==1.0.0
+rich==13.9.4
+rich-toolkit==0.12.0
+shellingham==1.5.4
 six==1.17.0
 sniffio==1.3.1
 soupsieve==2.6
@@ -53,9 +75,13 @@ SQLAlchemy==2.0.36
 starlette==0.41.3
 tenacity==9.0.0
 tqdm==4.67.1
+typer==0.15.1
 typing-inspect==0.9.0
 typing_extensions==4.12.2
 ujson==5.10.0
 urllib3==2.2.3
 uvicorn==0.34.0
+uvloop==0.21.0
+watchfiles==1.0.3
+websockets==14.1
 yarl==1.18.3
diff --git a/tests/test_main.py b/tests/test_main.py
new file mode 100644
index 0000000..2298bfc
--- /dev/null
+++ b/tests/test_main.py
@@ -0,0 +1,18 @@
+from fastapi.testclient import TestClient
+from main import app
+
+client = TestClient(app)
+
+def test_root_endpoint():
+    response = client.get("/")
+    assert response.status_code == 200
+    assert response.json() == {"message": "Welcome to your FastAPI application"}
+
+def test_health_endpoint():
+    response = client.get("/health")
+    assert response.status_code == 200
+    assert response.json() == {"status": "healthy"}
+
+def test_cors_headers():
+    response = client.get("/", headers={"Origin": "http://localhost:5173"})
+    assert response.headers["access-control-allow-origin"] == "http://localhost:5173"
\ No newline at end of file