Fixes and optimizes the Docker build (#206)

This resolves issue #203 and also optimizes the Dockerfile to use less
resources. Also the current version from the Git repo is copied to
the Docker container for easy access.

I've taken the liberty to also update the DTLSSocket requirement to
version 0.1.7 which resolves an issue regarding cython. According to
their repo, nothing else has changed [1].

The RPi and RPiW Dockerfiles were not updated because of compatibility
reasons. I cannot easily test those files and do not want to break
anything.

**References**

 1. https://git.fslab.de/jkonra2m/tinydtls-cython/commits/master

Dockerfile

@@ -1,22 +1,13 @@
-FROM debian:latest
+FROM python:3.7-stretch
 
-# https://community.home-assistant.io/t/ikea-tradfri-gateway-zigbee-very-basic-working-implementation/14788/19?u=balloob
-RUN apt-get update -y && \
-  apt-get install -y python3 python3-pip git autoconf automake libtool && \
-  apt-get clean && \
-  rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* build/
+COPY . /usr/src/app/
 
-RUN mkdir -p /usr/src/app /usr/src/build
-WORKDIR /usr/src/build
-
-RUN python3 -m pip install --upgrade pip setuptools wheel cython
-
-COPY ./script/install-coap-client.sh install-coap-client.sh
-RUN ./install-coap-client.sh
-
-COPY requirements.txt requirements.txt
-RUN python3 -m pip install -r requirements.txt
+RUN mkdir -p /usr/src/build && \
+    cd /usr/src/build && \
+    pip3 install --upgrade pip setuptools wheel cython && \
+    pip3 install -r /usr/src/app/requirements.txt && \
+    /usr/src/app/script/install-coap-client.sh && \
+    python /usr/src/app/setup.py install 
 
 WORKDIR /usr/src/app
-ENV LANG=C.UTF-8
-CMD /bin/bash
+

README.md

@@ -87,6 +87,8 @@ Please see the example files.
 
 There is a Docker script available to bootstrap a dev environment. Run `./script/dev_docker` and you will build and launch a container that is ready to go for both sync and async. After launching, follow the above instructions to test the library stand-alone.
 
+The working directory of the Docker image is `/usr/src/app`. The checked out version of this repo is added there and installed as a Python dependency for easy development and testing. When you want to use the latest stable version from pip, you only have to change to another working directory.
+
 ## Acknowledgements
 This is an implementation based on analysis [I](https://github.com/ggravlingen/) found [here](https://bitsex.net/software/2017/coap-endpoints-on-ikea-tradfri/) by [vidarlo](https://bitsex.net/).
 

requirements.txt

@@ -1,3 +1,3 @@
 aiocoap==0.4a1
-DTLSSocket==0.1.4
-typing>=3,<4
+DTLSSocket==0.1.7
+typing>=3,<4

script/dev_docker

@@ -19,9 +19,6 @@ case "$MACHINE" in
 esac
 
 docker build -t tradfri-dev -f "$PWD/$DOCKERFILE" .
+docker run -it --rm -v `pwd`:/usr/src/app -v /etc/localtime:/etc/localtime:ro \
+  --net=host tradfri-dev bash
 
-docker run \
-  --net=host \
-  -v /etc/localtime:/etc/localtime:ro \
-  -v `pwd`:/usr/src/app \
-  -t -i --rm tradfri-dev