Authentication and major rewriting

.gitlab-ci.yml

+stages:
+  - build
+
+build:
+  stage: build
+  image: docker:latest
+  services:
+    - docker:dind
+  script:
+    - apk add jq
+    - version=$(jq -r .version package.json)
+    - docker build -t registry.forgemia.inra.fr/in-sylva-development/in-sylva.portal:$version .
+    - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
+    - docker push registry.forgemia.inra.fr/in-sylva-development/in-sylva.portal:$version
+  when: manual