Add .gitlab-ci.yml

.gitlab-ci.yml

+stages:
+  - build
+
+before_script:
+  - echo "{\"auths\":{\"registry.kszk.bme.hu\":{\"username\":\"$CI_REG_USER\",\"password\":\"$CI_REG_PASS\"}}}" > /kaniko/.docker/config.json
+
+build:
+  stage: build
+  image:
+    name: gcr.io/kaniko-project/executor:debug
+    entrypoint: [""]
+  script:
+    - /kaniko/executor --context $CI_PROJECT_DIR --dockerfile $CI_PROJECT_DIR/Dockerfile --destination "registry.kszk.bme.hu/baseimg/oauth2_proxy_authsch"