Change structure to just to RUN commands. Cleanup installation files.

Dockerfile

@@ -5,62 +5,60 @@ LABEL com.example.vendor="bitegra e.K." \
       version="1.0.0" \
       description="Base Maven image to build Java Spring Boot applications."
 
-# Install git and curl wget gnupg2
-RUN apt-get update && \
-    apt-get install -y git curl wget gnupg2 && \
-    apt-get clean;
-
-# Install Java
 ARG JAVA_VERSION=11
-
-RUN echo "deb http://ppa.launchpad.net/linuxuprising/java/ubuntu bionic main" | tee /etc/apt/sources.list.d/linuxuprising-java.list
-RUN    apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 73C3DB2A
-RUN    apt-get update && \
-       echo oracle-java11-installer shared/accepted-oracle-license-v1-2 select true | /usr/bin/debconf-set-selections && \
-       apt-get install -y oracle-java11-set-default
-
-ENV JAVA_HOME=/usr/lib/jvm/java-11-oracle
-
-# Install Maven
 ARG MAVEN_VERSION=3.6.0
+ARG NODE_VERSION=11.x
 ARG USER_HOME_DIR="/root"
 ARG SHA=fae9c12b570c3ba18116a4e26ea524b29f7279c17cbaadc3326ca72927368924d9131d11b9e851b8dc9162228b6fdea955446be41207a5cfc61283dd8a561d2f
 ARG BASE_URL=https://apache.osuosl.org/maven/maven-3/${MAVEN_VERSION}/binaries
 
-RUN mkdir -p /usr/share/maven /usr/share/maven/ref \
-  mkdir -p /usr/share/maven /usr/share/maven/ref \
-  && curl -fsSL -o /tmp/apache-maven.tar.gz ${BASE_URL}/apache-maven-${MAVEN_VERSION}-bin.tar.gz \
-  && echo "${SHA}  /tmp/apache-maven.tar.gz" | sha512sum -c - \
-  && tar -xzf /tmp/apache-maven.tar.gz -C /usr/share/maven --strip-components=1 \
-  && rm -f /tmp/apache-maven.tar.gz \
-  && ln -s /usr/share/maven/bin/mvn /usr/bin/mvn
-
-ENV MAVEN_HOME /usr/share/maven
-ENV MAVEN_CONFIG "$USER_HOME_DIR/.m2"
-
-# Install Docker
-# Repository
 RUN apt-get update && \
-    apt-get install -y apt-transport-https software-properties-common
+    echo "Install gut, curl, wget, gnupg2..." && \
+    apt-get install -y git curl wget gnupg2
 
-RUN curl -fsSL https://download.docker.com/linux/ubuntu/gpg | apt-key add - && \
-    apt-key fingerprint 0EBFCD88 && \
-    add-apt-repository \
-       "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
 
-# Install Docker CE
-RUN apt-get update && \
-    apt-get install -y docker-ce
-
-# Install NodeJS
-RUN curl -sL https://deb.nodesource.com/setup_11.x | bash -
-RUN apt-get update && \
-    apt-get install -y nodejs
-
-# Install Headless Chrome
-RUN apt-get update && \
+RUN echo "Install Java JDK..." && \
+    echo "deb http://ppa.launchpad.net/linuxuprising/java/ubuntu bionic main" | tee /etc/apt/sources.list.d/linuxuprising-java.list && \
+    apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 73C3DB2A && \
+    echo oracle-java11-set-default shared/accepted-oracle-license-v1-2 select true | /usr/bin/debconf-set-selections && \
+    apt-get update && \
+    apt-get install -y oracle-java11-set-default && \
+    \
+    \
+    echo "Install Maven..." && \
+    mkdir -p /usr/share/maven /usr/share/maven/ref && \
+    curl -fsSL -o /tmp/apache-maven.tar.gz ${BASE_URL}/apache-maven-${MAVEN_VERSION}-bin.tar.gz && \
+    echo "${SHA}  /tmp/apache-maven.tar.gz" | sha512sum -c - && \
+    tar -xzf /tmp/apache-maven.tar.gz -C /usr/share/maven --strip-components=1 && \
+    rm -f /tmp/apache-maven.tar.gz && \
+    ln -s /usr/share/maven/bin/mvn /usr/bin/mvn && \
+    \
+    \
+    echo "Install Docker Repository..." && \
+    apt-get install -y apt-transport-https software-properties-common && \
+    curl -fsSL https://download.docker.com/linux/ubuntu/gpg | apt-key add - && \
+    apt-key fingerprint 0EBFCD88 && \
+    add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable" && \
+    \
+    echo "Install Docker CE..." && \
+    apt-get install -y docker-ce && \
+    \
+    \
+    echo "Install NodeJs..." && \
+    curl -sL https://deb.nodesource.com/setup_${NODE_VERSION} | bash - && \
+    apt-get install -y nodejs && \
+    \
+    \
+    echo "Install Headless Chrome..." && \
     apt-get install -y libappindicator3-1 fonts-liberation libxss1 xdg-utils libasound2 libnspr4 libnss3 && \
     wget https://dl.google.com/linux/direct/google-chrome-stable_current_amd64.deb && \
-    dpkg -i google-chrome*.deb
+    dpkg -i google-chrome*.deb && \
+    rm google-chrome-stable_current_amd64.deb && \
+    rm -rf /var/lib/apt/lists/* /var/cache/apt/* && \
+    apt-get clean;
+
+ENV JAVA_HOME=/usr/lib/jvm/java-11-oracle
+ENV MAVEN_HOME /usr/share/maven
+ENV MAVEN_CONFIG "$USER_HOME_DIR/.m2"
 
-CMD /bin/bash
\ No newline at end of file
+CMD /bin/bash