add GitLab CI configuration

Author: striezel

.dockerignore

@@ -3,5 +3,7 @@
 */node_modules/
 # GitHub Actions workflow
 .github/
+# GitLab pipelines
+.gitlab-ci.yml
 # Don't copy generated images.
 */*.png

.gitlab-ci.yml

@@ -0,0 +1,10 @@
+image: node:14-alpine
+
+node:
+  stage: build
+  before_script:
+    - node --version
+    - npm --version
+  script:
+    - cd ./export-server
+    - npm install