feat: x0 static variant — build script, Apache2 vhost, Docker container

[Copilot]

Introduces a fully self-contained static deployment path for x0, requiring no Python/PostgreSQL backend. Metadata files (object.json, skeleton.json, menu.json, text-data.json) are provided as templates to be filled in by the operator.

Changes

www/sysInitOnLoad.js

• Adds sysVarTextDataFile support — if defined, replaces the hardcoded /python/getText.py endpoint for text data loading. Falls back to the original path when undefined; dynamic deployments are unaffected.

const TextDataURL = (typeof sysVarTextDataFile !== 'undefined') ? sysVarTextDataFile : '/python/getText.py';
sysFactory.ObjText.requestXMLRPCData(TextDataURL);

static/ — new top-level static deployment root

• index.html — complete entry point with all JS <script> includes and hardcoded sysVar* config (sysVarPreLoadScript = undefined, sysVarMessageHandling = false, sysVarTextDataFile = "/data/text-data.json", etc.)
• data/object.json, data/skeleton.json, data/menu.json, data/text-data.json — operator-supplied metadata templates; expected format for text-data.json:

  { "TEXT_ID": { "value_de": "...", "value_en": "..." } }

bin/build-static.sh

• Copies all *.js from /www, static/ (Bootstrap/FontAwesome CSS), and image/ (favicon) into the output directory (defaults to static/). Does not overwrite data/ templates.

conf/vhost-x0-static.conf

• Serves /var/www/vhosts/x0-static with AllowMethods GET POST (required — x0's JS loader uses POST even for static JSON fetches) and forces Content-Type: application/json on .json files.

docker/x0-static.dockerfile

• Ubuntu 24.04 + Apache2; runs build-static.sh at image build time to assemble the static site from source. Enables mod_headers + mod_allowmethods. Exposes port 80.
• docker/build-x0-static.sh — builds x0-static image.
• docker/x0-start-static.sh — runs container, maps localhost:8080 → 80.