add Docker set up and app file

Dockerfile

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+FROM python:3.10
+
+WORKDIR /app
+
+ENV POETRY_VERSION=1.6.1
+RUN pip install "poetry==$POETRY_VERSION"
+
+RUN poetry config virtualenvs.create false
+
+COPY ./poetry.lock /app/poetry.lock
+COPY ./pyproject.toml /app/pyproject.toml
+RUN poetry install --no-dev
+
+# User
+RUN useradd -m -u 1000 user
+USER user
+ENV HOME /home/user
+ENV PATH $HOME/.local/bin:$PATH
+
+WORKDIR $HOME
+RUN mkdir app
+WORKDIR $HOME/app
+COPY . $HOME/app
+
+RUN --mount=type=secret,id=OPEN_API_KEY,mode=0444,required=true
+
+EXPOSE 8501
+CMD streamlit run src/app.py \
+    --server.headless true \
+    --server.enableCORS false \
+    --server.enableXsrfProtection false \
+    --server.fileWatcherType none

src/app.py

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+import streamlit as st
+
+st.title("Hello World!")