feat: add base container

.github/workflows/build-base-image.yaml

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+name: "Build and publish base container image"
+
+on:
+  push:
+    branches: [main]
+    paths:
+      - "images/base/**"
+  workflow_dispatch:
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}/base
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to GHCR
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Generate image metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          tags: |
+            type=raw,value=latest
+            type=raw,value={{date 'YYYYMMDD'}}
+            type=sha,prefix=
+
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          context: images/base
+          platforms: linux/amd64,linux/arm64
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max

.gitignore

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+.cursor
+

images/base/.dockerignore

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+.git
+.github
+*.md
+LICENSE

images/base/Dockerfile

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+FROM ubuntu:24.04
+
+ARG USERNAME=vscode
+ARG USER_UID=1000
+ARG USER_GID=$USER_UID
+
+ENV DEBIAN_FRONTEND=noninteractive
+ENV LANG=en_US.UTF-8
+ENV LC_ALL=en_US.UTF-8
+
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends \
+        apt-transport-https \
+        apt-utils \
+        ca-certificates \
+        curl \
+        gnupg2 \
+        locales \
+        lsb-release \
+        sudo \
+        tzdata \
+    && locale-gen en_US.UTF-8 \
+    && apt-get autoremove -y \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/*
+
+RUN groupadd --gid $USER_GID $USERNAME \
+    && useradd -s /bin/bash --uid $USER_UID --gid $USER_GID -m $USERNAME \
+    && echo "$USERNAME ALL=(root) NOPASSWD:ALL" > /etc/sudoers.d/$USERNAME \
+    && chmod 0440 /etc/sudoers.d/$USERNAME
+
+USER $USERNAME
+WORKDIR /home/$USERNAME