CI: Add building step and dockerfile

.gitlab-ci.yml

+variables:
+  DOCKER_TLS_CERTDIR: ""
+  GIT_STRATEGY: clone
+  REGISTRY_USER: chembl/eubopen
+  APPLICATION: eubopen-web
+  SERVER_IMAGE_TAG: ${CI_REGISTRY}/${REGISTRY_USER}/${APPLICATION}:${CI_COMMIT_SHORT_SHA}
+  DOCKER_DRIVER: overlay
+  CONFIGS_FOLDER: run_config
+  # Config staging
+  ENV_STAGING_FILE_PATH: ${CONFIGS_FOLDER}/staging/.env
+  # INGRESS_STAGING_FILE_PATH: ${CONFIGS_FOLDER}/staging/ingress.yml
+  # Config prod hx
+  ENV_PROD_HX_FILE_PATH: ${CONFIGS_FOLDER}/prod_hx/.env
+  # Config prod hx
+  ENV_PROD_HH_FILE_PATH: ${CONFIGS_FOLDER}/prod_hh/.env
+
+stages:
+  - build
+
+# ----------------------------------------------------------------------------------------------------------------------
+# build
+# ----------------------------------------------------------------------------------------------------------------------
+build:
+  image:
+    name: docker:latest
+    entrypoint: ["/bin/sh", "-c"]
+  stage: build
+  variables:
+    DOCKER_HOST: tcp://docker:2375
+  services:
+    - docker:dind
+  tags:
+    - dind
+  script:
+    - set -x
+    - echo 'building!'
+    - docker version # verify docker cli is there. Also prints server info
+    - echo $CI_REGISTRY_PASSWORD | docker login -u $CI_REGISTRY_USER --password-stdin $CI_REGISTRY
+    - echo building ${SERVER_IMAGE_TAG}
+    - docker build --tag ${SERVER_IMAGE_TAG} .
+    - docker push ${SERVER_IMAGE_TAG}
+

Dockerfile

+FROM node:lts
+ENV ENV_FILE_PATH=${ENV_FILE_PATH:-'/etc/run_config/.env'}
+
+LABEL maintainer="dmendez@ebi.ac.uk"
+
+ENV APP_SOURCE /usr/src/eubopen-web
+
+RUN mkdir -p ${APP_SOURCE}
+WORKDIR ${APP_SOURCE}
+
+RUN apt-get update -qq -y && \
+    apt-get upgrade -qq -y && \
+    apt-get install -qq -y git
+
+COPY . ${APP_SOURCE}
+
+RUN npm install
+
+ENV HOST 0.0.0.0
+
+EXPOSE 3000
+
+ENTRYPOINT ENV_FILE_PATH=${ENV_FILE_PATH} npm run build && npm start