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start_minimal.sh

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+#!/bin/bash
+
+# Minimal startup script for Turmli Calendar on Raspberry Pi Zero
+# Uses minimal resources and avoids problematic dependencies
+
+set -e
+
+# Configuration
+APP_DIR="/opt/turmli-calendar"
+APP_USER="pi"
+APP_PORT="8000"
+VENV_PATH="$APP_DIR/venv"
+
+# Colors for output
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+BLUE='\033[0;34m'
+NC='\033[0m'
+
+print_info() {
+    echo -e "${BLUE}ℹ${NC} $1"
+}
+
+print_success() {
+    echo -e "${GREEN}✓${NC} $1"
+}
+
+print_error() {
+    echo -e "${RED}✗${NC} $1"
+}
+
+print_warning() {
+    echo -e "${YELLOW}⚠${NC} $1"
+}
+
+# Check if running as correct user
+if [ "$EUID" -eq 0 ]; then 
+    print_error "Don't run this script as root. Use: ./start_minimal.sh"
+    exit 1
+fi
+
+# Check if application directory exists
+if [ ! -d "$APP_DIR" ]; then
+    print_error "Application directory not found: $APP_DIR"
+    print_info "Please run the deployment script first: sudo ./deploy_rpi.sh install"
+    exit 1
+fi
+
+# Check if virtual environment exists
+if [ ! -d "$VENV_PATH" ]; then
+    print_error "Virtual environment not found: $VENV_PATH"
+    print_info "Please run the deployment script first: sudo ./deploy_rpi.sh install"
+    exit 1
+fi
+
+# Change to application directory
+cd "$APP_DIR"
+
+# Show system resources before starting
+print_info "System resources before startup:"
+echo "  Memory: $(free -m | grep Mem | awk '{printf "Used: %dMB / Total: %dMB (%.1f%%)", $3, $2, $3*100/$2}')"
+echo "  Swap: $(free -m | grep Swap | awk '{printf "Used: %dMB / Total: %dMB", $3, $2}')"
+echo "  CPU Load: $(uptime | awk -F'load average:' '{print $2}')"
+echo "  Disk: $(df -h / | tail -1 | awk '{printf "Used: %s / Total: %s (%s)", $3, $2, $5}')"
+echo
+
+# Set environment variables for minimal resource usage
+export PYTHONUNBUFFERED=1
+export PYTHONDONTWRITEBYTECODE=1
+export MALLOC_ARENA_MAX=2  # Limit memory fragmentation
+export MALLOC_MMAP_THRESHOLD_=131072
+export MALLOC_TRIM_THRESHOLD_=131072
+export MALLOC_MMAP_MAX_=65536
+
+# Set a custom temp directory to avoid filling /tmp
+export TMPDIR="$APP_DIR/tmp"
+mkdir -p "$TMPDIR"
+
+# Clear Python cache to free memory
+find "$APP_DIR" -type d -name "__pycache__" -exec rm -rf {} + 2>/dev/null || true
+find "$APP_DIR" -name "*.pyc" -delete 2>/dev/null || true
+
+print_info "Starting Turmli Calendar with minimal resources..."
+print_info "Access the application at: http://$(hostname -I | cut -d' ' -f1):${APP_PORT}"
+print_info "Press Ctrl+C to stop"
+echo
+
+# Start uvicorn with minimal configuration
+# --workers 1: Single worker process
+# --loop asyncio: Standard event loop (no uvloop)
+# --no-access-log: Disable access logging to save resources
+# --log-level warning: Only log warnings and errors
+# --limit-concurrency 10: Limit concurrent connections
+# --timeout-keep-alive 5: Short keepalive timeout
+# --backlog 32: Smaller connection backlog
+
+exec "$VENV_PATH/bin/python" -m uvicorn main:app \
+    --host 0.0.0.0 \
+    --port ${APP_PORT} \
+    --workers 1 \
+    --loop asyncio \
+    --no-access-log \
+    --log-level warning \
+    --limit-concurrency 10 \
+    --timeout-keep-alive 5 \
+    --backlog 32 \
+    --no-use-colors