Switch reverse proxy to prebuilt OpenResty image

.gitlab-ci.yml

@@ -28,6 +28,14 @@ cache:
     when: manual
     allow_failure: true
 
+docker_openresty:
+  stage: dockerize
+  extends: .docker-build-template
+  variables:
+    IMAGE_NAME: openresty
+    WORKDIR_PATH: ./
+    DOCKERFILE_PATH: Dockerfile-openresty
+
 sync_dev_branch:
   stage: sync
   image: node:22@sha256:f6b9c31ace05502dd98ef777aaa20464362435dcc5e312b0e213121dcf7d8b95