Added ubuntu SDK wrapper

backend/app_sdk/Dockerfile_ubuntu

@@ -0,0 +1,19 @@
+FROM ubuntu as base
+
+FROM base as builder
+
+RUN apt-get update
+RUN apt-get dist-upgrade -y
+RUN apt install build-essential libffi-dev musl-dev openssl python3 python3-pip -y
+
+RUN mkdir /install
+WORKDIR /install
+
+COPY requirements.txt /requirements.txt
+RUN pip install --prefix="/install" -r /requirements.txt
+
+FROM base
+
+COPY --from=builder /install /usr/local
+COPY __init__.py /app/walkoff_app_sdk/__init__.py
+COPY app_base.py /app/walkoff_app_sdk/app_base.py