feat: add docker file for snyk with gradle 4.4

docker/Dockerfile.gradle-4.4

@@ -0,0 +1,43 @@
+FROM node:8-slim
+
+MAINTAINER Snyk Ltd
+
+# Install Java 8
+RUN echo "deb http://ppa.launchpad.net/webupd8team/java/ubuntu trusty main" | tee /etc/apt/sources.list.d/webupd8team-java.list
+RUN echo "deb-src http://ppa.launchpad.net/webupd8team/java/ubuntu trusty main" | tee -a /etc/apt/sources.list.d/webupd8team-java.list
+
+# Accept license non-iteractive
+RUN echo oracle-java8-installer shared/accepted-oracle-license-v1-1 select true | /usr/bin/debconf-set-selections
+RUN apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys EEA14886
+RUN apt-get update
+RUN apt-get install -y oracle-java8-installer oracle-java8-set-default
+
+#Install gradle
+RUN curl -L https://services.gradle.org/distributions/gradle-4.4-bin.zip -o gradle-4.4-bin.zip && \
+  apt-get install -y unzip && \
+  unzip gradle-4.4-bin.zip -d /home/node/
+
+# Install snyk cli
+RUN npm install --global snyk snyk-to-html && \
+    apt-get update && \
+    apt-get install -y jq
+
+ENV GRADLE_HOME=/home/node/gradle-4.4
+ENV PATH=$PATH:$GRADLE_HOME/bin
+
+RUN chmod -R a+wrx /home/node
+WORKDIR /home/node
+ENV HOME /home/node
+ENV M2 /home/node/.m2
+
+# The path at which the project is mounted (-v runtime arg)
+ENV PROJECT_PATH /project
+
+ADD docker-entrypoint.sh .
+ADD snyk_report.css .
+
+ENTRYPOINT ["./docker-entrypoint.sh"]
+
+# Default command is `snyk test`
+# Override with `docker run ... snyk/snyk-cli <command> <args>`
+CMD ["test"]