add the possibility to specify an external CA, to cover the case of the development environment

Dockerfile

@@ -12,5 +12,9 @@ FROM openjdk:11-jdk-slim
 WORKDIR /urbanite-dashboard-controller
 COPY --from=builder /home/app/target/*.jar /urbanite-dashboard-controller/app.jar
 
+ARG EXTRA_CA_URL
+RUN /bin/bash -c "[ -z $EXTRA_CA_URL ] || ( curl $EXTRA_CA_URL --output /ca.pem && keytool -import -noprompt -trustcacerts -alias ca -file /ca.pem -cacerts -storepass changeit )"
+# to check if ca is installed keytool -list -cacerts -alias ca --storepass changeit
+
 EXPOSE 8080
 ENTRYPOINT ["java","-jar","app.jar"]