Env variables in yaml config

Add support for .env variables in the yaml config. Closes #20 (closed). Also apply some minor fixes: #22 (closed)

Dockerfile

@@ -6,6 +6,7 @@ LABEL maintainer="Loxbie <ole@freirad.at>"
 
 RUN apt-get update && apt-get -y install \
       apt-utils \
+      alsa-utils \
       build-essential \
       ffmpeg \
       rsync
@@ -19,7 +20,7 @@ RUN mkdir -p /srv
 RUN mkdir -p /srv/src
 RUN mkdir -p /srv/config
 RUN mkdir -p /srv/log
-RUN mkdir -p /srv/audio/recordings/block
+RUN mkdir -p /var/audio/recordings/block
 
 COPY poetry.lock /srv
 COPY pyproject.toml /srv
@@ -32,7 +33,7 @@ WORKDIR /srv
 
 # RUN curl -sSL https://install.python-poetry.org | python3 -
 # RUN export PATH="/root/.local/bin:$PATH"
-RUN poetry install $(test "$YOUR_ENV" == production && echo "--no-dev") --no-interaction --no-ansi
+RUN poetry install --without dev --no-interaction
 
 # for Alsa when running docker run engine-recorder https://github.com/mviereck/x11docker/wiki/Container-sound:-ALSA-or-Pulseaudio