added file that handles CI

.gitlab-ci.yml

+# This file is a template, and might need editing before it works on your project.
+# Official docker image.
+image: storm2/ngx-voms-build:latest
+
+build:
+  stage: build
+  script:
+    - env | sort
+    - id
+    # ngx_http_voms_module build
+    - cd ../openresty-1.x.y
+    - ./configure ${resty_config_options} --add-module=../ngx_http_voms_module
+    - make && make install
+    # ngx_http_voms_module test
+    - cd ../ngx_http_voms_module
+    - cp -r t /tmp
+    - cd /tmp
+    - prove -v