diff --git a/.github/workflows/build-backend-docker.yml b/.github/workflows/build-backend-docker.yml
new file mode 100644
index 00000000..c2893376
--- /dev/null
+++ b/.github/workflows/build-backend-docker.yml
@@ -0,0 +1,19 @@
+name: Build Backend Docker Image 
+
+on: [push, pull_request]
+
+jobs:
+  build-backend-docker:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+
+    - name: Build image
+      uses: docker/build-push-action@v6
+      with:
+        context: backend
+        file: backend/Dockerfile
+        push: false
+        tags: ${{ github.sha }}
diff --git a/.gitignore b/.gitignore
index 5d5bb080..d3e27ae8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,3 +10,5 @@ venv/
 .ruff_cache/
 .mypy_cache/
 
+# docs
+documents.txt
diff --git a/backend/.env.example b/backend/.env.example
index 508da530..d9df5de0 100644
--- a/backend/.env.example
+++ b/backend/.env.example
@@ -1,4 +1,4 @@
-GOOGLE_API_KEY= 
+GOOGLE_API_KEY={{GOOGLE_API_KEY}}
 
 LANGCHAIN_TRACING_V2=
 LANGCHAIN_ENDPOINT=
diff --git a/backend/Dockerfile b/backend/Dockerfile
index b7f5c74d..c3705728 100644
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -1,10 +1,5 @@
 FROM python:3.12.3-slim
 
-RUN apt-get update && \
-    apt-get install -y gcc python3-dev && \
-    apt-get clean && \
-    rm -rf /var/lib/apt/lists/*
-
 WORKDIR /ORAssistant-backend
 
 COPY ./requirements.txt /ORAssistant-backend/requirements.txt
diff --git a/backend/requirements-test.txt b/backend/requirements-test.txt
index 2231f565..8e970672 100644
--- a/backend/requirements-test.txt
+++ b/backend/requirements-test.txt
@@ -1,231 +1,15 @@
-aiohttp==3.9.5
-aiosignal==1.3.1
-annotated-types==0.7.0
-anyio==4.4.0
-asttokens==2.4.1
-attrs==23.2.0
-backoff==2.2.1
+langchain==0.2.6
+langchain-community==0.2.6
+langchain-huggingface==0.0.3
+langchain-google-genai==1.0.7
 beautifulsoup4==4.12.3
-bs4==0.0.2
-cachetools==5.3.3
-certifi==2024.2.2
-cffi==1.16.0
-chardet==5.2.0
-charset-normalizer==3.3.2
-click==8.1.7
-comm==0.2.2
-cryptography==42.0.8
-dataclasses-json==0.6.6
-debugpy==1.6.7
-decorator==5.1.1
-deepdiff==7.0.1
-deprecation==2.1.0
-dnspython==2.6.1
-docstring_parser==0.16
-email_validator==2.1.1
-emoji==2.12.1
-exceptiongroup==1.2.0
-executing==2.0.1
-faiss-cpu==1.8.0
 fastapi==0.111.0
-fastapi-cli==0.0.4
-filelock==3.14.0
-filetype==1.2.0
-frozenlist==1.4.1
-fsspec==2024.5.0
-google-ai-generativelanguage==0.6.4
-google-api-core==2.19.0
-google-api-python-client==2.131.0
-google-auth==2.29.0
-google-auth-httplib2==0.2.0
-google-cloud-aiplatform==1.49.0
-google-cloud-bigquery==3.24.0
-google-cloud-core==2.4.1
-google-cloud-resource-manager==1.12.3
-google-cloud-storage==2.17.0
-google-crc32c==1.5.0
-google-generativeai==0.5.4
-google-resumable-media==2.7.1
-googleapis-common-protos==1.63.0
-greenlet==3.0.3
-grpc-google-iam-v1==0.13.0
-grpcio==1.64.0
-grpcio-status==1.62.2
-h11==0.14.0
-httpcore==1.0.5
-httplib2==0.22.0
-httptools==0.6.1
-httpx==0.27.0
-huggingface-hub==0.23.4
-idna==3.7
-importlib_metadata==7.1.0
-ipykernel==6.29.4
-ipython==8.25.0
-jedi==0.19.1
-Jinja2==3.1.4
-joblib==1.4.2
-jsonpatch==1.33
-jsonpath-python==1.0.6
-jsonpointer==2.4
-jsonschema==4.22.0
-jsonschema-specifications==2023.12.1
-jupyter_client==8.6.2
-jupyter_core==5.5.0
-langchain==0.2.5
-langchain-community==0.2.5
-langchain-core==0.2.9
-langchain-google-genai==1.0.5
-langchain-google-vertexai==1.0.5
-langchain-huggingface==0.0.3
-langchain-text-splitters==0.2.0
-langdetect==1.0.9
-langgraph==0.1.4
-langserve==0.2.1
-langsmith==0.1.77
-lxml==5.2.2
-lxml-stubs==0.5.1
-Markdown==3.6
-markdown-it-py==3.0.0
-MarkupSafe==2.1.5
-marshmallow==3.21.2
-matplotlib-inline==0.1.7
-mdurl==0.1.2
-mpmath==1.3.0
-multidict==6.0.5
-mypy==1.10.0
-mypy-extensions==1.0.0
-nest_asyncio==1.6.0
-networkx==3.3
-numpy==1.26.4
-nvidia-cublas-cu12==12.1.3.1
-nvidia-cuda-cupti-cu12==12.1.105
-nvidia-cuda-nvrtc-cu12==12.1.105
-nvidia-cuda-runtime-cu12==12.1.105
-nvidia-cudnn-cu12==8.9.2.26
-nvidia-cufft-cu12==11.0.2.54
-nvidia-curand-cu12==10.3.2.106
-nvidia-cusolver-cu12==11.4.5.107
-nvidia-cusparse-cu12==12.1.0.106
-nvidia-nccl-cu12==2.20.5
-nvidia-nvjitlink-cu12==12.5.40
-nvidia-nvtx-cu12==12.1.105
-ordered-set==4.1.0
-orjson==3.10.3
-overrides==7.7.0
-packaging==23.2
-pandas-stubs==2.2.2.240603
-parso==0.8.4
-pexpect==4.9.0
-pickleshare==0.7.5
-pillow==10.3.0
-pip==24.0
-platformdirs==4.2.2
-prompt_toolkit==3.0.46
-proto-plus==1.23.0
-protobuf==4.25.3
-psutil==5.9.0
-ptyprocess==0.7.0
-pure-eval==0.2.2
-py==1.11.0
-pyarrow==15.0.0
-pyasn1==0.6.0
-pyasn1_modules==0.4.0
-pycparser==2.22
-pydantic==2.7.2
-pydantic_core==2.18.3
-Pygments==2.18.0
-pylance==0.12.1
-pyparsing==3.1.2
-pypdf==4.2.0
-pyproject-toml==0.0.10
-python-dateutil==2.9.0.post0
-python-dotenv==1.0.1
-python-iso639==2024.4.27
-python-magic==0.4.27
-python-multipart==0.0.9
-PyYAML==6.0.1
-pyzmq==25.1.2
+faiss-cpu==1.8.0
+markdown==3.0.0
 rank-bm25==0.2.2
-rapidfuzz==3.9.2
-ratelimiter==1.2.0.post0
-referencing==0.35.1
-regex==2024.5.15
-requests==2.32.3
-retry==0.9.2
-rich==13.7.1
-rpds-py==0.18.1
-rsa==4.9
-ruff==0.4.8
-safetensors==0.4.3
-scikit-learn==1.5.0
-scipy==1.13.1
-sentence-transformers==3.0.0
-setuptools==69.5.1
-shapely==2.0.4
-shellingham==1.5.4
-six==1.16.0
-sniffio==1.3.1
-soupsieve==2.5
-SQLAlchemy==2.0.30
-sse-starlette==2.1.0
-stack-data==0.6.2
-starlette==0.37.2
-sympy==1.12.1
-tabulate==0.9.0
-tenacity==8.3.0
-threadpoolctl==3.5.0
-tokenizers==0.19.1
-toml==0.10.2
-torch==2.3.0
-tornado==6.4.1
-tqdm==4.66.4
-traitlets==5.14.3
-transformers==4.41.1
-tree-sitter==0.22.3
-typer==0.12.3
-types-beautifulsoup4==4.12.0.20240511
-types-cffi==1.16.0.20240331
-types-colorama==0.4.15.20240311
-types-decorator==5.1.8.20240310
-types-docutils==0.21.0.20240423
-types-hdbcli==2.21.0.20240621
-types-html5lib==1.1.11.20240228
-types-jsonschema==4.22.0.20240610
+mypy==1.0.1
 types-Markdown==3.6.0.20240316
-types-protobuf==5.27.0.20240626
-types-psutil==6.0.0.20240621
-types-psycopg2==2.9.21.20240417
-types-Pygments==2.18.0.20240506
-types-PyMySQL==1.1.0.20240524
-types-pyOpenSSL==24.1.0.20240425
-types-python-dateutil==2.9.0.20240316
-types-pytz==2024.1.0.20240417
-types-PyYAML==6.0.12.20240311
-types-redis==4.6.0.20240425
-types-regex==2024.5.15.20240519
 types-requests==2.32.0.20240622
-types-setuptools==70.1.0.20240627
-types-six==1.16.21.20240513
-types-tabulate==0.9.0.20240106
 types-tqdm==4.66.0.20240417
-types-tree-sitter==0.20.1.20240311
-types-tree-sitter-languages==1.10.0.20240612
-types-ujson==5.10.0.20240515
-types-xmltodict==0.13.0.3
-typing_extensions==4.12.2
-typing-inspect==0.9.0
-ujson==5.10.0
-unstructured==0.14.3
-unstructured-client==0.22.0
-uritemplate==4.1.1
-urllib3==2.2.2
-uvicorn==0.30.0
-uvloop==0.19.0
-vertexai==1.49.0
-watchfiles==0.22.0
-wcwidth==0.2.13
-websockets==12.0
-wheel==0.43.0
-wrapt==1.16.0
-yarl==1.9.4
-zipp==3.18.1
+types-beautifulsoup4==4.12.0.20240511
+ruff==0.5.1
diff --git a/backend/requirements.txt b/backend/requirements.txt
index ac81dd90..f21b399b 100644
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -1,119 +1,9 @@
-aiohttp==3.9.5
-aiosignal==1.3.1
-annotated-types==0.7.0
-anyio==4.4.0
-attrs==23.2.0
-beautifulsoup4==4.12.3
-bs4==0.0.2
-cachetools==5.3.3
-certifi==2024.6.2
-charset-normalizer==3.3.2
-click==8.1.7
-dataclasses-json==0.6.7
-dnspython==2.6.1
-email_validator==2.2.0
-faiss-cpu==1.8.0.post1
-fastapi==0.111.0
-fastapi-cli==0.0.4
-filelock==3.15.4
-frozenlist==1.4.1
-fsspec==2024.6.1
-google-ai-generativelanguage==0.6.6
-google-api-core==2.19.1
-google-api-python-client==2.135.0
-google-auth==2.31.0
-google-auth-httplib2==0.2.0
-google-generativeai==0.7.1
-googleapis-common-protos==1.63.2
-greenlet==3.0.3
-grpcio==1.64.1
-grpcio-status==1.62.2
-h11==0.14.0
-httpcore==1.0.5
-httplib2==0.22.0
-httptools==0.6.1
-httpx==0.27.0
-huggingface-hub==0.23.4
-idna==3.7
-Jinja2==3.1.4
-joblib==1.4.2
-jsonpatch==1.33
-jsonpointer==3.0.0
 langchain==0.2.6
 langchain-community==0.2.6
-langchain-core==0.2.10
-langchain-google-genai==1.0.7
 langchain-huggingface==0.0.3
-langchain-text-splitters==0.2.2
-langsmith==0.1.83
-Markdown==3.6
-markdown-it-py==3.0.0
-MarkupSafe==2.1.5
-marshmallow==3.21.3
-mdurl==0.1.2
-mpmath==1.3.0
-multidict==6.0.5
-mypy-extensions==1.0.0
-networkx==3.3
-numpy==1.26.4
-nvidia-cublas-cu12==12.1.3.1
-nvidia-cuda-cupti-cu12==12.1.105
-nvidia-cuda-nvrtc-cu12==12.1.105
-nvidia-cuda-runtime-cu12==12.1.105
-nvidia-cudnn-cu12==8.9.2.26
-nvidia-cufft-cu12==11.0.2.54
-nvidia-curand-cu12==10.3.2.106
-nvidia-cusolver-cu12==11.4.5.107
-nvidia-cusparse-cu12==12.1.0.106
-nvidia-nccl-cu12==2.20.5
-nvidia-nvjitlink-cu12==12.5.82
-nvidia-nvtx-cu12==12.1.105
-orjson==3.10.5
-packaging==24.1
-pillow==10.4.0
-pip==24.0
-proto-plus==1.24.0
-protobuf==4.25.3
-pyasn1==0.6.0
-pyasn1_modules==0.4.0
-pydantic==2.8.0
-pydantic_core==2.20.0
-Pygments==2.18.0
-pyparsing==3.1.2
-python-dotenv==1.0.1
-python-multipart==0.0.9
-PyYAML==6.0.1
+langchain-google-genai==1.0.7
+beautifulsoup4==4.12.3
+fastapi==0.111.0
+faiss-cpu==1.8.0
+markdown==3.0.0
 rank-bm25==0.2.2
-regex==2024.5.15
-requests==2.32.3
-rich==13.7.1
-rsa==4.9
-safetensors==0.4.3
-scikit-learn==1.5.0
-scipy==1.14.0
-sentence-transformers==3.0.1
-setuptools==69.5.1
-shellingham==1.5.4
-sniffio==1.3.1
-soupsieve==2.5
-SQLAlchemy==2.0.31
-starlette==0.37.2
-sympy==1.12.1
-tenacity==8.4.2
-threadpoolctl==3.5.0
-tokenizers==0.19.1
-torch==2.3.1
-tqdm==4.66.4
-transformers==4.42.3
-typer==0.12.3
-typing_extensions==4.12.2
-typing-inspect==0.9.0
-ujson==5.10.0
-uritemplate==4.1.1
-urllib3==2.2.2
-uvicorn==0.30.1
-uvloop==0.19.0
-watchfiles==0.22.0
-websockets==12.0
-wheel==0.43.0
-yarl==1.9.4
diff --git a/backend/src/api/routers/chains.py b/backend/src/api/routers/chains.py
index 0006ac4d..b9ef1df1 100644
--- a/backend/src/api/routers/chains.py
+++ b/backend/src/api/routers/chains.py
@@ -21,7 +21,7 @@ class UserInput(BaseModel):
 
 
 load_dotenv()
-use_cuda = os.getenv("USE_CUDA")
+use_cuda = True if os.getenv("USE_CUDA", "") == "true" else False
 
 llm = ChatGoogleGenerativeAI(model="gemini-pro", temperature=1)
 hf_embdeddings = "BAAI/bge-large-en-v1.5"