feat: add setup

obsidian.Dockerfile

@@ -0,0 +1,35 @@
+FROM node:22-bookworm-slim
+
+RUN apt-get update \
+ && apt-get install -y --no-install-recommends ca-certificates \
+ && rm -rf /var/lib/apt/lists/*
+
+RUN npm install -g obsidian-headless@latest
+
+WORKDIR /vault
+
+COPY <<'EOF' /usr/local/bin/entrypoint.sh
+#!/bin/sh
+set -e
+
+CONFIG_DIR=/root/.config/obsidian-headless
+
+if [ ! -f "$CONFIG_DIR/auth_token" ]; then
+  echo "[obsidian-headless] not logged in — run:"
+  echo "    docker exec -it beaver-obsidian ob login"
+  echo "then restart this container."
+  exec sleep infinity
+fi
+
+if ! ls "$CONFIG_DIR"/sync/*/config.json >/dev/null 2>&1; then
+  echo "[obsidian-headless] vault not configured — run:"
+  echo "    docker exec -it beaver-obsidian ob sync-setup --vault '<vault name>'"
+  echo "then restart this container."
+  exec sleep infinity
+fi
+
+exec ob sync --continuous
+EOF
+RUN chmod +x /usr/local/bin/entrypoint.sh
+
+ENTRYPOINT ["/usr/local/bin/entrypoint.sh"]