Remove PyPi build, convert project to not be a python module, add Docker build and files, update README,

Dockerfile

@@ -0,0 +1,16 @@
+FROM debian:12-slim AS build
+
+RUN apt-get update && \
+    apt-get install --no-install-suggests --no-install-recommends --yes python3-venv gcc libpython3-dev && \
+    python3 -m venv /venv && \
+    /venv/bin/pip install --upgrade pip setuptools wheel
+
+FROM build AS build-venv
+COPY requirements.txt /requirements.txt
+RUN /venv/bin/pip install --disable-pip-version-check -r /requirements.txt
+
+FROM gcr.io/distroless/python3-debian12
+COPY --from=build-venv /venv /venv
+COPY . /app
+WORKDIR /app
+ENTRYPOINT ["/venv/bin/python3", "app.py"]