fix: ensure data directory exists before init_db call (#79)

sqlite3.connect() fails with 'unable to open database file' on fresh
installs where data/ directory does not exist. This happens with both
Docker (bind mount creates ./data as root, container user can't write)
and bare Python (no data/ directory at all).

Fix ensures data/ exists before any database operation:
- main.py: add os.makedirs before init_db() call
- start-librecrawl.sh: mkdir -p data at script start
- start-librecrawl.bat: mkdir data at script start

Fixes #65

main.py

@@ -54,6 +54,9 @@ if not os.environ.get('SECRET_KEY'):
 # Enable compression for all responses
 Compress(app)
 
+# Ensure data directory exists before initializing the database
+os.makedirs("data", exist_ok=True)
+
 # Initialize database on startup
 init_db()
 

start-librecrawl.bat

@@ -1,5 +1,6 @@
 @echo off
 
+if not exist data mkdir data␍
 echo Checking for Docker...
 docker --version 2>nul
 if errorlevel 1 goto nodocker

start-librecrawl.sh

@@ -2,6 +2,7 @@
 
 # Start LibreCrawl - tries Docker first, falls back to Python
 
+mkdir -p data
 echo "Checking for Docker..."
 if command -v docker &> /dev/null && command -v docker compose &> /dev/null; then
     echo "Docker found! Starting LibreCrawl with Docker..."