clamnewproject: allow using DATADIR environment variable

clam/clamnewproject.py

@@ -194,7 +194,7 @@ def main():
 docker build -t "{sysid}" .
 
 #Note, this datadir will be non-persistent, you will likely want to change this in production settings
-DATADIR=$(mktemp -d)
+[ -z "$DATADIR" ] && DATADIR=$(mktemp -d)
 chmod go+wx "$DATADIR" #allow subuids/subgids to make directories, needed to prevent permission denied errors
 HOST_PORT={port}
 

docs/source/deployment.rst

@@ -35,11 +35,17 @@ and runs it like::
 
     docker run --rm -v "/path/to/data:/data" -p 8080:80 yourservice
 
+
 If you used the generated ``*.config.yml`` external configuration file, then
 you can configure a lot of the deployment specific variables via environment
 variables. Check the ``*.config.yml`` file to see which are available. Note
 that most environment variables carry the additional prefix `CLAM_`.
 
+The ``startserver_production.sh`` script generates a non-persistent data
+directory on the host for use by the container, you most likely want to change
+this either in the script itself or by setting a `DATADIR` environment variable
+to an existing directory on the host prior to running the script!
+
 The container is based on Alpine Linux and serves your CLAM webservice via
 nginx and uwsgi.