Add deployment automation

* Introduce `docker-compose.yml` for containerized service orchestration.
* Update `.gitlab-ci.yml` with new deployment stages and sync mechanisms, including production and dev environments.

main-website/.gitlab-ci.yml

@@ -0,0 +1,18 @@
+# Main Website - Build
+build_main:
+  stage: build
+  extends: .build-next-template
+  variables:
+    WORKDIR_PATH: main-website
+
+# Main Website - Dockerize
+docker_main:
+  stage: dockerize
+  extends: .docker-build-template
+  variables:
+    IMAGE_NAME: main-website
+    WORKDIR_PATH: main-website
+    DOCKERFILE_PATH: Dockerfile
+  needs:
+    - job: build_main
+      artifacts: true