Update Dockerfile

Dockerfile

@@ -7,8 +7,7 @@ ENV UVICORN_WORKERS=1
 # Writable storage
 ENV DATA_DIR=/data
 ENV HF_HOME=/data/.cache
-ENV DATABASE_URL=postgres://avnadmin:AVNS_6JaRn4RC2ePBHOKGaLg@openwebui-on-hf-openwebui-on-hf.h.aivencloud.com:26137/defaultdb?sslmode=require
-
+ENV DATABASE_URL=sqlite:///${DATA_DIR}/webui.db
 
 # Create & symlink
 RUN mkdir -p /data /data/.cache && \