Move zk cards to docs/zk/ for documentation restructuring (#84)

## Summary
- Move all existing zettelkasten cards from `docs/` to `docs/zk/` as a temporary holding area
- Update `zk-docs` mise task to look in the new location
- Add `docs/README.md` explaining the Diataxis-based restructuring plan and target audiences

## Context
This is phase 1 of a multi-phase documentation restructuring effort. The goal is to reorganize docs to follow the Diataxis framework while serving multiple audiences:
1. Erich (owner) - knowledge graph/zk
2. Claude/AI agents - memory and context enrichment
3. New external readers - high-level overview
4. Potential operators/contributors - onboarding
5. Replicators - people wanting to duplicate the approach

## Testing
- [x] Verified `mise run zk-docs` still works with the new path
- [x] Updated obsidian.nvim config (in ~/.config/nvim) to point to new path

## Note
The obsidian.nvim config change is outside this repo but was made as part of this work.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Reviewed-on: https://forge.ops.eblu.me/eblume/blumeops/pulls/84

containers/quartz/Dockerfile

@@ -0,0 +1,52 @@
+# Quartz Static Site Server
+# Downloads and serves a Quartz-built static site from a release bundle
+#
+# Configuration (via environment):
+#   DOCS_RELEASE_URL - URL to download the static site tarball
+#
+# The container downloads the tarball on startup, extracts it, and serves with nginx.
+
+FROM nginx:alpine
+
+# Install curl for downloading release assets
+RUN apk add --no-cache curl
+
+# Copy startup script
+COPY start.sh /start.sh
+RUN chmod +x /start.sh
+
+# Custom nginx config for SPA routing
+RUN cat > /etc/nginx/conf.d/default.conf << 'EOF'
+server {
+    listen 80;
+    server_name _;
+    root /usr/share/nginx/html;
+    index index.html;
+
+    # Enable gzip compression
+    gzip on;
+    gzip_types text/plain text/css application/json application/javascript text/xml application/xml text/javascript;
+
+    # Cache static assets
+    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2)$ {
+        expires 1y;
+        add_header Cache-Control "public, immutable";
+    }
+
+    # SPA fallback - serve index.html for client-side routing
+    location / {
+        try_files $uri $uri/ $uri.html /index.html;
+    }
+
+    # Health check endpoint
+    location /healthz {
+        access_log off;
+        return 200 "ok\n";
+        add_header Content-Type text/plain;
+    }
+}
+EOF
+
+EXPOSE 80
+
+CMD ["/start.sh"]

containers/quartz/start.sh

@@ -0,0 +1,31 @@
+#!/bin/sh
+set -e
+
+HTML_DIR="/usr/share/nginx/html"
+
+# Check for required environment variable
+if [ -z "$DOCS_RELEASE_URL" ]; then
+    echo "Error: DOCS_RELEASE_URL environment variable is required"
+    echo "Set it to the URL of the static site tarball to serve"
+    exit 1
+fi
+
+echo "Downloading docs from: $DOCS_RELEASE_URL"
+
+# Download the tarball
+if ! curl -fsSL "$DOCS_RELEASE_URL" -o /tmp/docs.tar.gz; then
+    echo "Error: Failed to download docs from $DOCS_RELEASE_URL"
+    exit 1
+fi
+
+# Clear existing content and extract
+rm -rf "${HTML_DIR:?}"/*
+echo "Extracting docs to $HTML_DIR"
+tar -xzf /tmp/docs.tar.gz -C "$HTML_DIR"
+rm /tmp/docs.tar.gz
+
+echo "Docs extracted successfully"
+echo "Starting nginx..."
+
+# Start nginx in foreground
+exec nginx -g "daemon off;"