Dockerfile

# 1. Inherit from official latest image (Includes Docker CLI, Git, Jq)
FROM ghcr.io/actions/actions-runner:latest

# 2. Switch to root to install dependencies
USER root

# 3. Install missing build tools
# build-essential: Includes make, gcc, g++
# python3: Required for some npm install dependencies
RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential \
    python3-minimal \
    python3-pip \
    python3-venv \
    git-lfs \
    wget \
    curl \
    ca-certificates \
    && git lfs install \
    && wget https://github.com/mikefarah/yq/releases/download/3.4.1/yq_linux_amd64 -O /usr/bin/yq && chmod +x /usr/bin/yq \
    && curl -fsSL https://get.helm.sh/helm-v3.14.0-linux-amd64.tar.gz | tar -xz \
    && mv linux-amd64/helm /usr/local/bin/helm && chmod +x /usr/local/bin/helm && rm -rf linux-amd64 \
    && curl -sSL -o /usr/local/bin/argocd https://github.com/argoproj/argo-cd/releases/download/v2.11.9/argocd-linux-amd64 && chmod +x /usr/local/bin/argocd \
    && curl -sSL -o /usr/local/bin/mc https://dl.min.io/client/mc/release/linux-amd64/mc && chmod +x /usr/local/bin/mc \
    && apt-get clean \
    && rm -rf /var/lib/apt/lists/*

# 4. Install Docker Compose plugin (V2)
RUN mkdir -p /usr/local/lib/docker/cli-plugins \
    && curl -SL https://github.com/docker/compose/releases/download/v2.27.1/docker-compose-linux-x86_64 \
       -o /usr/local/lib/docker/cli-plugins/docker-compose \
    && chmod +x /usr/local/lib/docker/cli-plugins/docker-compose

# 5. Switch back to runner user (Mandatory)
USER runner

# 6. Pre-install helm-push plugin (avoid runtime download from GitHub CDN which is blocked in GKE)
RUN helm plugin install https://github.com/chartmuseum/helm-push --version v0.10.4