chore: import upstream snapshot with attribution

examples/container-machine-vscode/Dockerfile

@@ -0,0 +1,35 @@
+FROM swift:6.3.2-noble
+
+# Install system dependencies for Swift + OpenSSH + systemd + containerization
+RUN apt-get update \
+ && apt-get install -y --no-install-recommends \
+      curl ca-certificates git sudo systemd systemd-sysv openssh-server \
+      binutils gpg vim libc6-dev libcurl4-openssl-dev libedit2 libgcc-s1 \
+      unzip gnupg2 libgcc-13-dev libstdc++-13-dev libncurses-dev \
+      libpython3-dev libsqlite3-0 libstdc++6 libxml2-dev libz3-dev \
+      pkg-config tzdata zlib1g-dev \
+ && apt-get clean && rm -rf /var/lib/apt/lists/*
+
+# Passwordless sudo for all users
+RUN echo 'ALL ALL=(ALL:ALL) NOPASSWD: ALL' > /etc/sudoers.d/nopasswd \
+ && chmod 0440 /etc/sudoers.d/nopasswd
+
+# Configure OpenSSH for local-only use:
+#   - Both password and public key auth enabled (no brute-force risk on loopback)
+#   - UseDNS no             — skip reverse DNS lookup, avoids multi-second connect delay
+#   - GSSAPIAuthentication no — skip GSSAPI negotiation, faster handshake
+RUN mkdir -p /var/run/sshd \
+ && ssh-keygen -A \
+ && sed -i 's/^#\?PermitRootLogin.*/PermitRootLogin no/'                    /etc/ssh/sshd_config \
+ && sed -i 's/^#\?PasswordAuthentication.*/PasswordAuthentication yes/'     /etc/ssh/sshd_config \
+ && sed -i 's/^#\?PubkeyAuthentication.*/PubkeyAuthentication yes/'         /etc/ssh/sshd_config \
+ && echo 'UseDNS no'               >> /etc/ssh/sshd_config \
+ && echo 'GSSAPIAuthentication no' >> /etc/ssh/sshd_config \
+ && systemctl enable ssh
+
+RUN systemctl mask getty@.service systemd-logind.service \
+      apt-daily.timer apt-daily-upgrade.timer fstrim.timer || true
+
+EXPOSE 22
+STOPSIGNAL SIGRTMIN+3
+CMD ["/sbin/init"]