diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..bd94690
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,4 @@
+FROM cron
+MAINTAINER gyurix
+COPY . /
+ENTRYPOINT ["/entrypoint.sh"]
diff --git a/cron-re-read.sh b/cron-re-read.sh
new file mode 100755
index 0000000..dac540a
--- /dev/null
+++ b/cron-re-read.sh
@@ -0,0 +1,11 @@
+#! /bin/sh
+
+file="/crontab";
+{
+echo "SHELL=/bin/sh
+ * * * * * /cron-re-read.sh"
+} > "$file";
+
+cat /crontab.txt >> /crontab
+
+crontab -l | cat /crontab |crontab -
diff --git a/crontab.txt b/crontab.txt
new file mode 100644
index 0000000..58a71c2
--- /dev/null
+++ b/crontab.txt
@@ -0,0 +1,3 @@
+* * * * * echo "OK"
+* * * * * echo "OK2"
+* * * * * echo "OK3"
diff --git a/entrypoint.sh b/entrypoint.sh
new file mode 100755
index 0000000..f1ff4dd
--- /dev/null
+++ b/entrypoint.sh
@@ -0,0 +1,11 @@
+#! /bin/sh
+
+file="/crontab";
+{
+echo "SHELL=/bin/sh
+ * * * * * /cron-re-read.sh"
+} >> "$file";
+
+crontab -l | cat /crontab |crontab -
+
+crond -f