Attempt on optimizing Docker image.

Dockerfile

@@ -1,6 +1,14 @@
 FROM node:7.10.0
 
-ARG TS3CLIENT_VERSION=3.0.19.4
+# Install runtime packages
+RUN apt-get update &&\
+	export INITRD=no &&\
+	export DEBIAN_FRONTEND=noninteractive &&\
+	apt-get install -y --no-install-recommends \
+		ca-certificates \
+		blackbox xvfb xdotool \
+		pulseaudio pulseaudio-utils \
+		vlc-nox '^libvlc[0-9]+$' vlc-plugin-pulse
 
 # Add "app" user
 RUN mkdir -p /tmp/empty &&\
@@ -8,13 +16,12 @@ RUN mkdir -p /tmp/empty &&\
 	useradd -d /home/app -l -N -g app -m -k /tmp/empty -u 9999 app &&\
 	rmdir /tmp/empty
 
-ADD setup.sh /
-COPY src/ /home/app/src/
-RUN sed -i 's,\r,,g' /setup.sh &&\
-	sh /setup.sh
+ARG TS3CLIENT_VERSION=3.0.19.4
 
-# Copy over configuration for other daemons
-COPY etc/ /etc
+COPY . /home/app/ts3bot/
+RUN cd ~app/ts3bot &&\
+	sed -i 's,\r,,g' setup.sh &&\
+	sh setup.sh
 
 # Startup configuration
 WORKDIR /home/app

setup.sh

@@ -7,13 +7,16 @@ export INITRD=no
 export DEBIAN_FRONTEND=noninteractive
 
 # Now install all packages we need
-apt-get update
 apt-get install -y --no-install-recommends \
 	ca-certificates \
 	blackbox xvfb xdotool \
 	pulseaudio pulseaudio-utils \
 	cmake python-minimal \
 	vlc-nox '^libvlc[0-9]+$' libvlc-dev vlc-plugin-pulse
+apt-mark auto \
+	cmake \
+	python-minimal \
+	libvlc-dev
 
 # Configure GUI user, we are going to use the pre-setup "app" user for this
 mkdir -p /config
@@ -22,24 +25,26 @@ ln -sf /config ~app/.ts3bot
 # Install TeamSpeak3.
 # Original comment that used to be here: temporary non-interactive teamspeak3 install hack, remove before publishing!!
 # In fact, it would be nice if we had some lazy handling code for this that just requires the user to provide a "--agree-with-license" once.
+(
 	cd ~app
 	wget "http://teamspeak.gameserver.gamed.de/ts3/releases/${TS3CLIENT_VERSION}/TeamSpeak3-Client-linux_amd64-${TS3CLIENT_VERSION}.run" -Ots3client.run
 	chmod +x ./ts3client.run
 	sed -i 's/^MS_PrintLicense$/#MS_PrintLicense/g' ./ts3client.run
 	./ts3client.run --quiet --target ts3client
 	rm ./ts3client.run
+)
 
-# Install TS3Bot via Git
+# Install TS3Bot
+(
+	cd ~app/ts3bot
 	npm_config_wcjs_runtime="node" npm_config_wcjs_runtime_version="$(node --version | tr -d 'v')" \
-	npm link --unsafe-perm ~app/src
-
-# Replace the shipped youtube-dl with the latest version (this is a hack that will hopefully be fixed soon!)
-wget -O/usr/local/bin/youtube-dl "https://yt-dl.org/downloads/latest/youtube-dl"
-rm -f "$(dirname "$(readlink -f "$(which ts3bot)")")/node_modules/youtube-dl/bin/youtube-dl"
-ln -sf "/usr/local/bin/youtube-dl" "$(dirname "$(readlink -f "$(which ts3bot)")")/node_modules/youtube-dl/bin/youtube-dl"
-chmod a+rx "/usr/local/bin/youtube-dl"
+		yarn global add --prod --check-files --verbose file:$(pwd)
+)
 
 # Clean up APT
-apt-get autoremove -y --purge wget cmake cmake-data
+apt-get autoremove -y --purge
 apt-get clean
 rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
+
+# Copy over configuration for daemons
+cp -a etc/* /etc/