v2.1.54 Changelog: - add Handlebars variable support in proxy advanced config snippets - validate advanced config snippets against Handlebars rendering and ignore Handlebars markers in nginx brace checks - fix proxy host template built-in field persistence for forward and redirect settings - fix Docker runtime swap handling so zero swap does not expand to memory plus equal swap - derive Docker CPU limits from NanoCPUs or CPUQuota/CPUPeriod for stable readback and validation - update docker daemon runtime writes to keep CPU quota fields in sync with NanoCPUs