Initialize .gitlab-ci.yml for build pipelines

.gitlab-ci.yml

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+# This file is a template, and might need editing before it works on your project.
+# This is a sample GitLab CI/CD configuration file that should run without any modifications.
+# It demonstrates a basic 3 stage CI/CD pipeline. Instead of real tests or scripts,
+# it uses echo commands to simulate the pipeline execution.
+#
+# A pipeline is composed of independent jobs that run scripts, grouped into stages.
+# Stages run in sequential order, but jobs within stages run in parallel.
+#
+# For more information, see: https://docs.gitlab.com/ee/ci/yaml/index.html#stages
+#
+# You can copy and paste this template into a new `.gitlab-ci.yml` file.
+# You should not add this template to an existing `.gitlab-ci.yml` file by using the `include:` keyword.
+#
+# To contribute improvements to CI/CD templates, please follow the Development guide at:
+# https://docs.gitlab.com/ee/development/cicd/templates.html
+# This specific template is located at:
+# https://gitlab.com/gitlab-org/gitlab/-/blob/master/lib/gitlab/ci/templates/Getting-Started.gitlab-ci.yml
+
+stages:          # List of stages for jobs, and their order of execution
+  - build
+
+build-ubuntu:       # This job runs in the build stage, which runs first.
+  stage: build
+  image: ubuntu:latest  # Maybe replace with image with more required dependencies
+  before_script:
+    - apt update --yes
+    - apt install --yes cmake gcc g++ git
+  script:
+    - echo "Compiling the code..."
+    - git submodule update --init --recursive
+    - ls -la
+    # TODO: Add build instructions for linux
+    - echo "Compile complete."
+  
+build-win:
+  stage: build
+  tags:
+    - shared-windows
+    - windows
+    - windows-1809
+  script:
+    - echo "Compiling the code..."
+    - dir
+    # TODO: Add build instructions for windows
+    - echo "Compile complete."