Add env variable driven timezone

Dockerfile

@@ -11,7 +11,7 @@ RUN apk --no-cache add \
 # Install backuppc build dependencies
 gcc g++ autoconf automake make git patch perl perl-dev perl-cgi expat expat-dev curl wget \
 # Install backuppc runtime dependencies
-supervisor rsync samba-client iputils openssh openssl rrdtool msmtp lighttpd lighttpd-mod_auth gzip apache2-utils \
+supervisor rsync samba-client iputils openssh openssl rrdtool msmtp lighttpd lighttpd-mod_auth gzip apache2-utils tzdata \
 # Compile and install needed perl modules
 && cpan App::cpanminus \
 && cpanm -n Archive::Zip XML::RSS File::Listing \

README.md

@@ -17,7 +17,9 @@
 	* [Advanced SMTP configuration](#advanced-smtp-configuration)
 * [Upgrading](#upgrading)
 	* [Dockerising an existing BackupPC v3.x](#dockerising-an-existing-backuppc-v3x)
-* [Shell access](#shell-access)
+* [Miscellaneous](#miscellaneous)
+    * [Timezone](#timezone)
+    * [Shell access](#shell-access)
 
 ## Introduction
 
@@ -222,6 +224,32 @@ docker run \
 
 The configure.pl script will detect a v3.x version under /etc/backuppc, and will run appropriate upgrade operations (in particular enabling legacy v3.x pool to access it from a BackupPC v4.x).
 
+## Miscellaneous
+
+### Timezone
+
+By default the timezone of this docker is set to UTC. To modify it, you can specify a tzdata-compatible timezone in the environment variable `TZ`.
+
+```bash
+# For Paris time (including daylight)
+docker run \
+    --name backuppc \
+    --publish 80:8080 \
+    --env TZ=Europe/Paris \
+    adferrand/backuppc
+```
+
+Alternatively, you can sync the container timezone to its host by mounting the host file `/etc/localtime` to the container path `/etc/localtime`.
+
+```bash
+# For Paris time (including daylight)
+docker run \
+    --name backuppc \
+    --publish 80:8080 \
+    --mount /etc/localtime:/etc/localtime:ro \
+    adferrand/backuppc
+```
+
 ## Shell access
 
 For debugging and maintenance purpose, you may need to start a shell in your running container. With a Docker of version 1.3.0 or higher, you can do:

VERSION

@@ -1 +1 @@
-4.1.3-5
+4.1.3-6

files/entrypoint.sh

@@ -5,6 +5,11 @@ if [ -f /firstrun ]; then
 	echo 'First run of the container. BackupPC will be installed.'
 	echo 'If exist, configuration and data will be reused and upgraded as needed.'
 
+	# Configure timezone if needed
+	if [ -z "$TZ" ]; then
+		cp /usr/share/zoneinfo/$TZ /etc/localtime 
+	fi
+
 	# Create backuppc user
 	addgroup -S -g ${BACKUPPC_GUID:-1000} backuppc
 	adduser -D -S -h /home/backuppc -G backuppc -u ${BACKUPPC_UUID:-1000} backuppc