Update Dockerfile, .gitlab-ci.yml, README.md files

.gitlab-ci.yml

+stages:
+  - build
+  - deploy
+variables:
+  GIT_DEPTH: "1"
+
+before_script:
+  - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
+
+.build-image:
+  stage: build
+  script:
+    - docker build --pull -t $TARGET_IMAGE .
+    - docker push $TARGET_IMAGE
+
+build-x86:
+  extends: .build-image
+  tags:
+    - docker
+  variables:
+    TARGET_IMAGE: $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG-x86
+
+build-arm:
+  extends: .build-image
+  tags:
+    - docker-arm
+  variables:
+    TARGET_IMAGE: $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG-arm
+
+.deploy:
+  stage: deploy
+  tags:
+    - docker
+  script:
+    - docker pull $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG-x86
+    - docker pull $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG-arm
+    - docker manifest create $TARGET_IMAGE --amend $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG-x86 --amend
+      $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG-arm
+    - docker manifest push $TARGET_IMAGE
+
+deploy_latest:
+  extends: .deploy
+  variables:
+    TARGET_IMAGE: $CI_REGISTRY_IMAGE:latest
+  only:
+    - master
+
+deploy_branch:
+  extends: .deploy
+  variables:
+    TARGET_IMAGE: $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG

Dockerfile

+FROM git-registry.mycard.moe/mycard/docker-runner-base:debian11 as premake-builder
+
+WORKDIR /usr/src
+RUN wget -O premake.zip https://github.com/premake/premake-core/releases/download/v5.0.0-beta5/premake-5.0.0-beta5-src.zip && \
+    7z x -y premake.zip && \
+    mv premake-5.0.0-beta5-src premake && \
+    cd premake/build/gmake2.unix && \
+    make -j$(nproc)
+
+FROM git-registry.mycard.moe/mycard/docker-runner-base:debian11 as libevent-builder
+
+WORKDIR /usr/src
+RUN wget -O - https://cdn02.moecube.com:444/ygopro-build-materials/libevent-2.0.22-stable.tar.gz | tar zfx - && \
+    cd libevent-2.0.22-stable && \
+    ./configure --prefix=/usr/share/libevent-stable --disable-openssl --enable-static=yes --enable-shared=no && \
+    make -j$(nproc) && \
+    make install
+
+FROM git-registry.mycard.moe/mycard/docker-runner-base:debian11
+
+RUN apt update && \
+    apt -y install git build-essential libgl1-mesa-dev libglu-dev libxxf86vm-dev && \
+    rm -rf /var/lib/apt/lists/* /var/cache/* /tmp/* /var/tmp/* /var/log/*
+
+COPY --from=premake-builder /usr/src/premake/bin/release/premake5 /usr/bin/premake5
+COPY --from=libevent-builder /usr/share/libevent-stable /usr/share/libevent-stable

README.md

 # docker-ygopro-builder
 
+## Resources
+
+- `/usr/bin/premake5`
+- `/usr/share/libevent-stable