Keep checksum file outside shared/mounted area

target/check-for-changes.sh

@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # create date for log output
 log_date=$(date +"%Y-%m-%d %H:%M:%S ")
@@ -6,6 +6,10 @@ log_date=$(date +"%Y-%m-%d %H:%M:%S ")
 sleep 5
 echo "${log_date} Start check-for-changes script."
 
+# create work area outside mounted directory
+mkdir -p /tmp/docker-mailserver-work
+CHKSUM_FILE=/tmp/docker-mailserver-work/chksum
+
 # change directory
 cd /tmp/docker-mailserver
 
@@ -33,7 +37,7 @@ done
 
 # Update / generate after start
 echo "${log_date} Makeing new checksum file."
-sha512sum ${cf_files[@]/#/--tag } > chksum
+sha512sum ${cf_files[@]/#/--tag } >$CHKSUM_FILE
 
 # Run forever
 while true; do
@@ -42,7 +46,7 @@ while true; do
 log_date=$(date +"%Y-%m-%d %H:%M:%S ")
 
 # Get chksum and check it.
-chksum=$(sha512sum -c --ignore-missing chksum)
+chksum=$(sha512sum -c --ignore-missing $CHKSUM_FILE)
 
 if [[ $chksum == *"FAIL"* ]]; then
 	echo "${log_date} Change detected"
@@ -187,7 +191,7 @@ if [[ $chksum == *"FAIL"* ]]; then
 	fi 
 
 	echo "${log_date} Update checksum"
-	sha512sum ${cf_files[@]/#/--tag } > chksum
+	sha512sum ${cf_files[@]/#/--tag } >$CHKSUM_FILE
 fi
 
 sleep 1

test/config/chksum

@@ -1,2 +0,0 @@
-SHA512 (postfix-accounts.cf) = 8eba4eedb76e8c3b740ca4eea5d7ad1c8695fd7fd39d3e5d161201101b5b63a1c1471ab85bd79d6ed4ba192c423275a3d1210a9596a06904434ab5707ad3753b
-SHA512 (postfix-virtual.cf) = c5bff9b5c50886a72a559ee52b1230b751c3820cd12de3ffe2a632f8d2a7845fa33ddac397c62889f0680d096be24418f22c1b81fb93ad56fd4937869f16954b