Add dev/prod environments with TrueNAS Docker production deploy.

Split PostgreSQL into gallery_dev and gallery_prod, add Docker/Gitea deploy tooling,
SMB image sync, pgAdmin split script, dev:web on Keenetic :5173, and operator docs.

Co-authored-by: Cursor <cursoragent@cursor.com>

infra/docker/truenas-load-image.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+# Load a docker save tarball on TrueNAS and tag for the Gallery Custom App.
+set -euo pipefail
+
+TAR_PATH="${1:-}"
+TAG="${2:-latest}"
+IMAGE="gitea.mysuperlab.netcraze.pro/danilka/gallery-web"
+
+if [[ -z "$TAR_PATH" || ! -f "$TAR_PATH" ]]; then
+  echo "Usage: sudo bash truenas-load-image.sh /path/to/gallery-web.tar [tag]"
+  exit 1
+fi
+
+docker load -i "$TAR_PATH"
+docker tag "${IMAGE}:${TAG}" "${IMAGE}:latest"
+docker images "${IMAGE}"
+echo "Set Custom App pull_policy to IfNotPresent, then restart gallery-web."