Finished API design and Frontend features

Closes #13 (closed) Closes #21 (closed)

src/Dockerfile

+FROM python:3.12
+
+WORKDIR /app
+
+#copy G-Retriever ./G-Retriever
+copy . ./src
+
+RUN pip install pyg-lib -f https://data.pyg.org/whl/torch-2.3.0+cu118.html
+RUN pip install -r ./src/requirements.txt
+
+CMD ["fastapi", "dev", "src/api.py", "--host", "0.0.0.0"]
+