Update Dockerfile

Add information for default capabilities provided from the base image

Dockerfile

@@ -3,36 +3,41 @@ FROM sonarsource/sonar-scanner-cli:4.7 as sonars
 FROM maven:3.8.6-eclipse-temurin-11 as maven
 FROM atlassian/bamboo-agent-base:8.2.1 as ship
 
-# Install and configure as ROOT
+##### Install and configure as ROOT
 USER root
 
-### Copy secrets
+# Copy secrets
 COPY secrets /etc/secrets
 RUN chmod a+wr /etc/secrets
 
 ### Copy scripts
 COPY scripts /scripts
 RUN chmod a+wrx -R /scripts/*.sh # Required due to permission loss on Windows
-#### Install using scripts
+# Install using scripts
 RUN /scripts/install.all.sh
-#### Configure using scripts
+# Configure using scripts
 RUN /scripts/config.all.sh
 
 # Overwrite entrypoint command to start services before bamboo agent
 COPY entrypoint.sh /entrypoint.sh
 RUN chmod a+wrx /entrypoint.sh
 CMD ["/entrypoint.sh"]
 
-### Install maven
+#### Install maven
 ENV MAVEN_HOME=/usr/share/maven
 COPY --from=maven /usr/share/maven ${MAVEN_HOME}
 RUN ln -s ${MAVEN_HOME} /opt/maven
 
-### Install Sonar Scanner
+#### Install Sonar Scanner
 ENV SONAR_SCANNER_HOME /opt/sonar-scanner
 COPY --from=sonars /opt/sonar-scanner ${SONAR_SCANNER_HOME}
 
-# Update capabilities as RUN_USER
+#### Update capabilities as RUN_USER
+# Atlassian bamboo base image comes with capabilities:
+#  - "system.jdk.JDK 1.11" ${JAVA_HOME}/bin/java
+#  - "Python" /usr/bin/python3
+#  - "Python 3" /usr/bin/python3
+#  - "Git"  /usr/bin/git # NOTE: not set on correct capability in the base image, thus setting it here
 USER ${RUN_USER}
 RUN /bamboo-update-capability.sh "system.builder.mvn3.Maven 3" ${MAVEN_HOME} \
     && /bamboo-update-capability.sh "system.git.executable" /usr/bin/git \