diff --git a/gmi/docker/Dockerfile b/gmi/docker/Dockerfile
index 6789bdb..92571bc 100644
--- a/gmi/docker/Dockerfile
+++ b/gmi/docker/Dockerfile
@@ -2,14 +2,15 @@ FROM alpine:latest
 
 RUN sed -i 's/dl-cdn.alpinelinux.org/mirrors.tuna.tsinghua.edu.cn/g' /etc/apk/repositories \
     && sed -i 'a https://mirrors.tuna.tsinghua.edu.cn/alpine/edge/testing' /etc/apk/repositories \
-    && apk add agate git \
+    && apk add agate git python3 \
     && touch /var/log/git.log
 
-RUN git clone https://github.com/dongdigua/dongdigua.github.io.git --depth 1
+RUN git clone https://github.com/dongdigua/dongdigua.github.io.git --depth 1 \
+    && echo "0  *  *  *  *  run-parts /etc/periodic/hourly" > /var/spool/cron/crontabs/root
 
 COPY run-wrapper.sh .
 # https://weinan.io/2019/04/06/cron.html
-COPY update-git.sh /etc/periotic/daily/
+COPY update-git.sh /etc/periotic/hourly/
 
 # for testing purpose only
 # RUN mkdir /etc/periodic/1min \
@@ -17,5 +18,4 @@ COPY update-git.sh /etc/periotic/daily/
 #     >> /var/spool/cron/crontabs/root
 # COPY update-git.sh /etc/periodic/1min/
 
-
 CMD [ "./run-wrapper.sh" ]
diff --git a/images/nuclear.png b/images/nuclear.png
deleted file mode 100644
index 28c4802..0000000
Binary files a/images/nuclear.png and /dev/null differ
diff --git a/index.gmi b/index.gmi
index 028b6ee..2665d47 100644
--- a/index.gmi
+++ b/index.gmi
@@ -2,5 +2,5 @@
 
 (a fancy homepage coming soon)
 
-=> posts posts
+=> posts.gmi posts
 => https://dongdigua.github.io HyperTextMachineLearning site
diff --git a/index.html b/index.html
index 73936f2..9067674 100644
--- a/index.html
+++ b/index.html
@@ -6,7 +6,7 @@
 <title>~dongdigua</title>
 <meta name=author content="dongdigua's blog">
 <link rel=license href=https://creativecommons.org/licenses/by/4.0/>
-<link rel="shortcut icon" href=./images/nuclear.png>
+<link rel="icon" href="data:;base64,=">
 <style>
  *{scrollbar-color:gray #404040}
  *::selection{background:#434C5E}