feat: Add dynamic host IP detection for Docker Compose and Supabase config

- Add docker-compose.sh wrapper script that auto-detects host IP
- Update docker-compose.yml to use environment variable substitution
- Update Supabase config.toml files to use HOST_SITE_URL and SUPABASE_API_URL env vars
- Add scripts/get-host-ip.sh for IP detection
- Add scripts/set-host-env.sh for environment setup
- Add scripts/supabase-with-env.sh wrapper for Supabase CLI
- Add documentation for Docker Compose environment setup
- Update README.md with new usage instructions
- Replace hardcoded URLs with dynamic environment variables

scripts/supabase-with-env.sh

@@ -0,0 +1,24 @@
+#!/bin/bash
+# Wrapper script for Supabase CLI that automatically sets HOST_SITE_URL
+# Usage: ./scripts/supabase-with-env.sh <supabase-command> [args...]
+
+# Get the script directory
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+PROJECT_ROOT="$(cd "$SCRIPT_DIR/.." && pwd)"
+
+# Source the environment setup script
+source "$SCRIPT_DIR/set-host-env.sh"
+
+# Change to project root (Supabase CLI looks for supabase/ directory)
+cd "$PROJECT_ROOT" || exit 1
+
+# Check if supabase command exists
+if ! command -v supabase >/dev/null 2>&1; then
+    echo "Error: Supabase CLI is not installed or not in PATH" >&2
+    echo "Install it from: https://supabase.com/docs/guides/cli" >&2
+    exit 1
+fi
+
+# Run the supabase command with all arguments
+exec supabase "$@"
+