feat(deploy): compose deploy fixed

backend/entrypoint.sh

@@ -0,0 +1,13 @@
+#!/bin/sh
+echo "----------------------------------------------------------------"
+echo "Starting Backend Application"
+echo "DB_URL: $DB_URL"
+echo "DB_USERNAME: $DB_USERNAME"
+echo "SLICER_PATH: $SLICER_PATH"
+echo "----------------------------------------------------------------"
+
+# Exec java with explicit properties from env
+exec java -jar app.jar \
+  --spring.datasource.url="${DB_URL}" \
+  --spring.datasource.username="${DB_USERNAME}" \
+  --spring.datasource.password="${DB_PASSWORD}"