New simplified Chromebook centric branch, without volume mounting on home + new alpine container image (should work on any aarch64)

micro-alpine-dev/Dockerfile

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+FROM alpine:latest
+
+# Core packages (Alpine equivalents)
+RUN apk update && apk add --no-cache \
+        openssh \
+        sudo \
+        ca-certificates \
+        git \
+        curl wget \
+        vim nano \
+        htop \
+        build-base \
+        fastfetch
+
+# Create 'micro' user with UID 1000 and primary group 'micro'
+RUN addgroup -g 1000 micro && \
+    adduser -D -u 1000 -G micro -s /bin/sh micro && \
+    echo "micro:ChangeMe123" | chpasswd
+
+# Create sudo group and add micro to it
+RUN addgroup -S sudo && \
+    adduser micro sudo && \
+    # Enable sudo for %sudo group in /etc/sudoers
+    sed -i 's/# %sudo/%sudo/' /etc/sudoers
+
+# Prepare .ssh directory
+RUN mkdir -p /home/micro/.ssh && \
+    chown -R micro:micro /home/micro && \
+    chmod 700 /home/micro/.ssh
+
+# SSH server config: key-only login, use ~/.ssh/authorized_keys
+RUN sed -i 's/#PasswordAuthentication yes/PasswordAuthentication no/' /etc/ssh/sshd_config || true && \
+    sed -i 's/PasswordAuthentication yes/PasswordAuthentication no/' /etc/ssh/sshd_config || true && \
+    sed -i 's/#KbdInteractiveAuthentication yes/KbdInteractiveAuthentication no/' /etc/ssh/sshd_config || true && \
+    sed -i 's/#PubkeyAuthentication yes/PubkeyAuthentication yes/' /etc/ssh/sshd_config || true && \
+    sed -i 's|#AuthorizedKeysFile.*|AuthorizedKeysFile .ssh/authorized_keys|' /etc/ssh/sshd_config || true && \
+    echo 'UsePAM no' >> /etc/ssh/sshd_config
+
+# sshd runtime dirs + host keys
+RUN mkdir -p /var/run/sshd && \
+    ssh-keygen -A
+
+# Fastfetch config for micro
+RUN mkdir -p /home/micro/.config/fastfetch
+COPY fastfetch_config.json /home/micro/.config/fastfetch/config.jsonc
+RUN chown -R micro:micro /home/micro/.config && \
+    echo 'if command -v fastfetch >/dev/null 2>&1; then fastfetch; fi' >> /home/micro/.profile && \
+    chown micro:micro /home/micro/.profile
+
+EXPOSE 22
+
+CMD ["/usr/sbin/sshd", "-D"]
+

micro-alpine-dev/build-dockerfile.sh

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+#!/usr/bin/env bash
+set -euo pipefail
+
+IMAGE_NAME="$(basename "$(pwd)")"
+
+echo "Building Docker image: ${IMAGE_NAME}:latest"
+docker build -t "${IMAGE_NAME}:latest" .
+

micro-alpine-dev/fastfetch_config.json

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+{
+  "display": {
+    "separator": " == "
+  },
+  "modules": [
+    "title",
+    "os",
+    "kernel",
+    "cpu",
+    "memory",
+    "disk",
+    "shell"
+  ]
+}
+