Merge public/master

Author: ic0ns

Dockerfile

@@ -1,10 +1,8 @@
-FROM openjdk:8-slim-stretch
-RUN apt-get update && apt-get upgrade -y && apt-get -y install git maven 
+FROM maven:3.6.1-jdk-8
 RUN git clone https://github.com/RUB-NDS/TLS-Attacker.git
-RUN git clone https://github.com/RUB-NDS/TLS-Scanner.git
+RUN git clone https://github.com/RUB-NDS/TLS-Scanner.git --recurse-submodules
 WORKDIR /TLS-Attacker/
 RUN mvn clean install -DskipTests=true
-RUN git clone https://github.com/RUB-NDS/TLS-Scanner.git
 WORKDIR /TLS-Scanner/
 RUN mvn clean install -DskipTests=true
 WORKDIR /TLS-Scanner/apps/