feat: Add health check and diagnostics to launch_dev.sh for improved reliability

Co-authored-by: Copilot <copilot@github.com>

Website/Dockerfile

@@ -36,6 +36,9 @@ RUN set -eu; \
 COPY requirements.txt ./
 RUN pip install --no-cache-dir -r requirements.txt
 
+# Copy application sources into the image (templates, static, main app, config)
+COPY . /app
+
 EXPOSE 4999
 
 CMD ["gunicorn", "-c", "gunicorn.conf.py", "main:app"]

Website/launch_dev.sh

@@ -15,6 +15,12 @@ echo "  INSTANCE_TLS_MODE=$INSTANCE_TLS_MODE"
 echo "  INSTANCE_PARENT_DOMAIN=$INSTANCE_PARENT_DOMAIN"
 echo "  DEV_HOSTS_REFRESH_INTERVAL=$DEV_HOSTS_REFRESH_INTERVAL"
 
+# Ensure required runtime files exist before building
+if [ ! -f "$SCRIPT_DIR/gunicorn.conf.py" ]; then
+	echo "[FEHLER] gunicorn.conf.py fehlt in $SCRIPT_DIR. Bitte prüfen." >&2
+	exit 2
+fi
+
 docker compose build website
 docker compose up -d
 
@@ -24,6 +30,31 @@ if [[ -x "$NGINX_SCRIPT" ]]; then
 	sudo "$NGINX_SCRIPT" apply || echo "Warnung: Nginx konnte nicht automatisch aktualisiert werden."
 fi
 
+# Wait for website to become healthy (simple HTTP check)
+check_url="http://127.0.0.1:4999/"
+timeout_seconds=60
+interval=2
+elapsed=0
+
+echo "Warte auf Website (${check_url}) bis ${timeout_seconds}s..."
+while [ $elapsed -lt $timeout_seconds ]; do
+	if curl -sS --max-time 2 "$check_url" >/dev/null 2>&1; then
+		echo "Website erreichbar nach ${elapsed}s"
+		break
+	fi
+	sleep $interval
+	elapsed=$((elapsed + interval))
+done
+
+if [ $elapsed -ge $timeout_seconds ]; then
+	echo "[FEHLER] Website nicht erreichbar nach ${timeout_seconds}s. Sammle Diagnosedaten..."
+	echo "--- docker compose ps ---"
+	docker compose ps || true
+	echo "--- docker logs website (tail 200) ---"
+	docker logs --tail 200 website-website-1 || true
+	echo "Bitte prüfe Container-Logs und nginx-Konfiguration."
+fi
+
 if [[ -x "$SCRIPT_DIR/sync_dev_hosts.sh" ]]; then
 	"$SCRIPT_DIR/sync_dev_hosts.sh" || true
 	if [[ "${DEV_HOSTS_REFRESH_INTERVAL}" != "0" ]]; then