diff --git a/Dockerfile b/Dockerfile
index 2a7cd49..fdae6a9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -9,6 +9,7 @@ FROM ubuntu
 RUN apt-get -y update && apt-get install -y curl && rm -rf /var/lib/apt/lists/*
 COPY gs /usr/bin/gs
 RUN mkdir -p /usr/local/share/tessdata
+ENV TESSDATA_PREFIX /usr/local/share/tessdata
 RUN curl https://github.com/tesseract-ocr/tessdata_best/raw/main/eng.traineddata -o /usr/local/share/tessdata/eng.traineddata
 RUN curl https://github.com/tesseract-ocr/tessdata_best/raw/main/chi_sim.traineddata -o /usr/local/share/tessdata/chi_sim.traineddata
 RUN curl https://github.com/tesseract-ocr/tessdata_best/raw/main/chi_sim_vert.traineddata -o /usr/local/share/tessdata/chi_sim_vert.traineddata
@@ -19,7 +20,6 @@ RUN curl https://github.com/tesseract-ocr/tessdata_best/raw/main/jpn_vert.traine
 RUN curl https://github.com/tesseract-ocr/tessdata_best/raw/main/kor.traineddata -o /usr/local/share/tessdata/kor.traineddata
 RUN curl https://github.com/tesseract-ocr/tessdata_best/raw/main/kor_vert.traineddata -o /usr/local/share/tessdata/kor_vert.traineddata
 RUN apt-get -y remove curl
-RUN mkdir -p /opt/pdftoolbox
 RUN mkdir -p /opt/pdftoolbox/input
 RUN mkdir -p /opt/pdftoolbox/output
 COPY --from=build /build/pdftoolbox /opt/pdftoolbox/pdftoolbox
diff --git a/README.md b/README.md
index 239902d..b9bf481 100644
--- a/README.md
+++ b/README.md
@@ -1,9 +1,11 @@
 
 [![docker build](https://github.com/lixiaofei123/pdftoolbox/actions/workflows/docker.yml/badge.svg)](https://github.com/lixiaofei123/pdftoolbox/actions/workflows/docker.yml)
 
-## 一个简单的在线压缩pdf网站
+## 一个简单的在线pdf工具箱
 
-使用 [GhostScript](https://www.ghostscript.com) 进行压缩
+本项目基于[GhostScript](https://www.ghostscript.com)进行开发,目前支持PDF压缩以及PDF文字提取(OCR)
+
+PDF文字提取目前支持的语言有 英文、简体中文、繁体中文、日文、韩文
 
 ## 使用方法
 
@@ -11,7 +13,11 @@
 
 建议使用Docker一键部署
 
+安装步骤
+
 ```
+mkdir -p /data/pdftoolbox/input
+mkdir -p /data/pdftoolbox/output
 docker run -d --name pdftoolbox --restart=always -p 8082:8082 -v /data/pdftoolbox/input:/opt/pdftoolbox/input  -v /data/pdftoolbox/output:/opt/pdftoolbox/output  mrlee326/pdftoolbox
 ```