doc

• update of .gitlab-ci.yml to deploy java documentation in GitLab Pages

.gitlab-ci.yml

 stages:
   - build
   - test
+  - deploy
 
 variables:
   MAVEN_OPTS: "-Dmaven.repo.local=$CI_PROJECT_DIR/.m2/repository"
@@ -14,11 +15,26 @@ maven:
   stage: build
   when: always
   script:
-   - mvn clean install
+    - mvn clean install
+
   artifacts:
     paths:
       - target/*.jar
 
+
+pages:
+  image: maven:3.6.3-jdk-11
+  stage: deploy
+  script:
+    - mvn javadoc:javadoc
+    - mkdir .public
+    - cp -r target/site .public
+    - mv .public public
+  artifacts:
+    paths:
+      - public
+
+
 selectionParamaterSweep:
   image: maven:3.6.3-jdk-11
   stage: test
@@ -37,4 +53,4 @@ doubleParamaterSweep:
     - mvn -Dtest=DoubleParameterSweep test
   artifacts:
     paths:
-      - target/*.csv
\ No newline at end of file
+      - target/*.csv