Update docker file to install craftbeerpi

Also install cbpi-ui from avollkopf repository.

Dockerfile

@@ -1,14 +1,43 @@
-FROM python:3.5.6-stretch
+FROM alpine:latest as download
+RUN apk --no-cache add curl && mkdir /downloads
+# Download installation files
+RUN curl https://github.com/avollkopf/craftbeerpi4-ui/archive/main.zip -L -o ./downloads/cbpi-ui.zip
 
-WORKDIR /usr/src/app
+FROM python:3.7-slim
 
-COPY dist/cbpi-0.0.1.tar.gz ./
+# Install dependencies
-RUN pip install cbpi-0.0.1.tar.gz --no-cache-dir
+RUN     apt-get update \
+    &&  apt-get upgrade -y
+RUN apt-get install --no-install-recommends -y \
+    libatlas-base-dev \
+    libffi-dev \
+    python3-pip \
+    && rm -rf /var/lib/apt/lists/*
 
-COPY . .
+RUN python -m pip install --upgrade pip setuptools wheel
 
-EXPOSE 8080
+WORKDIR /cbpi
+# Create non-root user working directory
+RUN groupadd -g 1000 -r craftbeerpi \
+    && useradd -u 1000 -r -s /bin/false -g craftbeerpi craftbeerpi \
+    && chown craftbeerpi:craftbeerpi /cbpi
 
-CMD [ "cbpi" ]
+# Install craftbeerpi from source
+COPY . /cbpi-src
+RUN pip3 install --no-cache-dir /cbpi-src
 
+# Install craftbeerpi-ui
+COPY --from=download /downloads /downloads
+RUN pip3 install --no-cache-dir /downloads/cbpi-ui.zip
 
+# Clean up installation files
+RUN rm -rf /downloads /cbpi-src
+
+USER craftbeerpi
+
+RUN cbpi setup
+
+EXPOSE 8000
+
+# Start cbpi
+CMD ["cbpi", "start"]