Dockerize it

.dockerignore

+.git
+.gitlab-ci.yml
+.dockerignore
+.gitignore
+Dockerfile

.gitlab-ci.yml

+# * `.gitlab-ci.yml` file copied and modified from the GitLab Documentation (as of 2021-01-10, the contents of the script seem to have changed by now)
+#   * Title of the documentation page: "Building a Docker image with kaniko"
+#   * Author: (c) 2011-present GitLab B.V.
+#   * URL: https://docs.gitlab.com/ee/ci/docker/using_kaniko.html#building-a-docker-image-with-kaniko
+#   * License: CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0)
+
+docker-build:
+    image:
+        name: gcr.io/kaniko-project/executor:debug
+        entrypoint: [""]
+    stage: build
+    before_script:
+        - mkdir -p /kaniko/.docker
+        - echo "{\"auths\":{\"$CI_REGISTRY\":{\"username\":\"$CI_REGISTRY_USER\",\"password\":\"$CI_REGISTRY_PASSWORD\"}}}" > /kaniko/.docker/config.json
+    script:
+        - /kaniko/executor --context $CI_PROJECT_DIR --dockerfile $CI_PROJECT_DIR/Dockerfile --destination $CI_REGISTRY_IMAGE:$CI_COMMIT_TAG
+    only:
+        - master

Dockerfile

+FROM nginx:latest
+
+COPY . /usr/share/nginx/html