Make image packaging and installation optional

Eventually, images should not be transferred as part of the application package,
using a more efficient mechanism instead. Other cases may already exist where
packaging without the image is preferrable.

When the `PACKAGE_IMAGES` variable is not set to 1 (default: 1), images will not
be included in the package. The installation script now handles the case where
the `images` folder is missing altogether.

install.sh

@@ -37,7 +37,7 @@ echo "importing root files"
 cp -rfv $LOCATION/root/* /
 
 # import docker images
-for f in $(find $LOCATION/images -name "*.img");do
+for f in $(find $LOCATION/images -name "*.img" 2>/dev/null);do
   echo "importing docker image: $f"
   docker load -i $f
 done

package.sh

@@ -11,8 +11,15 @@
 # basic path info
 LOCATION="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
 PROJECT_ROOT="$(realpath $LOCATION)"
-PACKAGE_NAME="streamline-emr"
+
-OUTPUT_DIR="$PROJECT_ROOT/build-packages"
+# configurable options (override with env vars as needed)
+PACKAGE_NAME=${PACKAGE_NAME-"streamline-emr"}
+OUTPUT_DIR=${OUTPUT_DIR-"$PROJECT_ROOT/build-packages"}
+PACKAGE_IMAGES=${PACKAGE_IMAGES:-1}
+
+echo "packaging $PACKAGE_NAME"
+echo "  output dir: $OUTPUT_DIR"
+echo "  package images: $PACKAGE_IMAGES"
 
 # work from the project root
 pushd $PROJECT_ROOT > /dev/null
@@ -75,6 +82,7 @@ for platform in "linux/amd64" "linux/arm64"; do
   cp ${PROJECT_ROOT}/install.sh ${PACKAGE_ROOT}/
   cp -a ${PROJECT_ROOT}/root ${PACKAGE_ROOT}/
 
+  if [ "${PACKAGE_IMAGES}" = "1" ]; then
     # add images
     i=0
     # read image list from file (e.g. 'images-aarch64')
@@ -91,6 +99,9 @@ for platform in "linux/amd64" "linux/arm64"; do
       echo "saving to '${path}'"
       docker save -o ${path} $dest
     done
+  else
+    echo "skipping image packaging as requested"
+  fi
 
   # setup output directory and cleanup old files if necessary
   mkdir -p $OUTPUT_DIR