fix: improve lftp mirror command for existing directories

Change mirror command to work better with existing target directories:
- Use cd/lcd to change to directories first
- Simplify mirror command to work from current directories
- Add mkdir fallback if target directory doesn't exist
- Fix SSL setting from ssl-allow to ssl-force for proper FTPS

This resolves issues when httpsdocs directory already exists on server.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

scripts/deploy.sh

@@ -33,7 +33,6 @@ NC='\033[0m' # No Color
 
 # Configuration
 FTPS_SERVER="www.markusgraf.ch"
-FTPS_USER="gurix"
 TARGET_DIR="httpsdocs"
 SOURCE_DIR="public"
 
@@ -96,6 +95,13 @@ check_prerequisites() {
     export FTPS_PASSWORD='your-password'"
     fi
 
+    # Check if FTPS_USER is set
+    if [ -z "${FTPS_USER:-}" ]; then
+        error "FTPS_USER environment variable is not set.
+    Please set it before running this script:
+    export FTPS_USER='user'"
+    fi
+
     success "All prerequisites met."
 }
 
@@ -119,7 +125,9 @@ deploy() {
         set net:max-retries 3;
         set net:reconnect-interval-base 5;
         open ftps://$FTPS_USER:$FTPS_PASSWORD@$FTPS_SERVER;
-        mirror --reverse --delete --verbose --parallel=3 $SOURCE_DIR $TARGET_DIR;
+        cd $TARGET_DIR || mkdir -p $TARGET_DIR;
+        lcd $SOURCE_DIR;
+        mirror --reverse --delete --verbose --parallel=3;
         bye
     "