add octoprint

fixes #73
fixes #71

Dockerfile

@@ -1,4 +1,4 @@
-ARG OCTOPRINT_BASE_IMAGE
+ARG PYTHON_BASE_IMAGE=3.8-slim-buster
 
 FROM ubuntu AS s6build
 ARG S6_RELEASE
@@ -18,7 +18,10 @@ RUN ARCH= && dpkgArch="$(dpkg --print-architecture)" \
   && curl -fsSLO "https://github.com/just-containers/s6-overlay/releases/download/$S6_VERSION/s6-overlay-$ARCH.tar.gz"
 
 
-FROM octoprint/octoprint:${OCTOPRINT_BASE_IMAGE} AS build
+FROM python:${PYTHON_BASE_IMAGE} AS build
+
+ARG tag
+ENV tag ${tag:-master}
 
 USER root
 
@@ -46,6 +49,17 @@ COPY --from=s6build /tmp /tmp
 RUN s6tar=$(find /tmp -name "s6-overlay-*.tar.gz") \
   && tar xzf $s6tar -C / 
 
+# Install octoprint
+RUN	curl -fsSLO --compressed --retry 3 --retry-delay 10 \
+  https://github.com/OctoPrint/OctoPrint/archive/${tag}.tar.gz \
+	&& mkdir -p /opt/octoprint \
+  && tar xzf ${tag}.tar.gz --strip-components 1 -C /opt/octoprint --no-same-owner
+
+WORKDIR /opt/octoprint
+RUN pip install -r requirements.txt
+RUN python setup.py install
+RUN ls -s ~/.octoprint /octoprint
+
 # Install mjpg-streamer
 RUN curl -fsSLO --compressed --retry 3 --retry-delay 10 \
   https://github.com/jacksonliam/mjpg-streamer/archive/master.tar.gz \
@@ -60,6 +74,8 @@ RUN make install
 COPY root /
 ENV CAMERA_DEV /dev/video0
 ENV MJPEG_STREAMER_INPUT -y -n -r 640x480
+ENV PIP_USER true
+ENV PYTHONUSERBASE /octoprint/plugins
 
 # port to access haproxy frontend
 EXPOSE 80