feat: pull image from registry instead of local build, ask stable/nightly

start.sh now pulls gitea.it-drui.de/viewit/kx-bridge:latest or :nightly
depending on user choice (interactive prompt or ./start.sh <channel>
argument), instead of building the image locally from source.

start.sh

@@ -1,10 +1,12 @@
 #!/usr/bin/env bash
-# start.sh – KX-Bridge starten (baut Docker-Image automatisch wenn nötig)
+# start.sh – KX-Bridge starten (zieht das fertige Image aus der Registry)
 
 set -euo pipefail
 
 cd "$(dirname "$0")"
 
+IMAGE_BASE="gitea.it-drui.de/viewit/kx-bridge"
+
 # .env anlegen falls nicht vorhanden
 if [[ ! -f .env ]]; then
     if [[ -f .env.example ]]; then
@@ -30,38 +32,38 @@ if ! docker info > /dev/null 2>&1; then
     exit 1
 fi
 
-# Prüfen ob Build nötig ist
-NEEDS_BUILD=0
-if ! docker image inspect kx-bridge:latest > /dev/null 2>&1; then
-    echo "[start] Image nicht vorhanden – baue kx-bridge:latest ..."
-    NEEDS_BUILD=1
+# Release-Kanal abfragen
+CHANNEL=""
+if [[ "${1:-}" == "stable" || "${1:-}" == "nightly" ]]; then
+    CHANNEL="$1"
 else
-    # Image-Erstellungszeit in Unix-Sekunden
-    IMAGE_TS=$(docker inspect --format='{{.Created}}' kx-bridge:latest \
-        | python3 -c "import sys,datetime; s=sys.stdin.read().strip(); \
-          s=s[:26].rstrip('Z').replace('T',' '); \
-          print(int(datetime.datetime.fromisoformat(s).replace(tzinfo=datetime.timezone.utc).timestamp()))" 2>/dev/null || echo 0)
-
-    for f in Dockerfile \
-              bridge/kobrax_moonraker_bridge.py \
-              bridge/kobrax_client.py \
-              bridge/env_loader.py \
-              bridge/requirements.txt \
-              bridge/anycubic_slicer.crt \
-              bridge/anycubic_slicer.key; do
-        if [[ -f "$f" ]]; then
-            FILE_TS=$(python3 -c "import os; print(int(os.path.getmtime('$f')))" 2>/dev/null || echo 0)
-            if [[ $FILE_TS -gt $IMAGE_TS ]]; then
-                echo "[start] '$f' ist neuer als das Image – baue neu ..."
-                NEEDS_BUILD=1
-                break
-            fi
-        fi
-    done
+    echo ""
+    echo "  Welchen Release-Kanal möchtest du starten?"
+    echo "    1) stable   (empfohlen)"
+    echo "    2) nightly  (getestete Vorabversion)"
+    echo -n "  Auswahl [1]: "
+    read -r CHOICE
+    case "$CHOICE" in
+        2) CHANNEL="nightly" ;;
+        *) CHANNEL="stable" ;;
+    esac
 fi
 
-if [[ $NEEDS_BUILD -eq 1 ]]; then
-    docker build -t kx-bridge:latest .
+if [[ "$CHANNEL" == "nightly" ]]; then
+    IMAGE_TAG="nightly"
+else
+    IMAGE_TAG="latest"
+fi
+IMAGE="$IMAGE_BASE:$IMAGE_TAG"
+
+echo "[start] Kanal: $CHANNEL  →  Image: $IMAGE"
+echo "[start] Ziehe aktuelles Image ..."
+docker pull "$IMAGE"
+
+# docker-compose.yml auf den gewählten Kanal umschreiben (nur die image-Zeile)
+if [[ -f docker-compose.yml ]]; then
+    sed -i.bak -E "s#^(\s*image:\s*).*#\1$IMAGE#" docker-compose.yml
+    rm -f docker-compose.yml.bak
 fi
 
 # Container starten
@@ -70,7 +72,7 @@ docker-compose down 2>/dev/null || true
 docker-compose up -d
 
 echo ""
-echo "  ✓ KX-Bridge läuft"
+echo "  ✓ KX-Bridge läuft ($CHANNEL)"
 echo "  Web-UI : http://$(hostname -I | awk '{print $1}'):7125"
 echo "  Logs   : docker-compose logs -f"
 echo "  Stop   : docker-compose down"