Remove notify app folder and installed python packages before we deploy the app

appspec.yml

@@ -5,6 +5,10 @@ files:
   - destination: /home/notify-app/notifications-api
     source: /
 hooks:
+  BeforeInstall:
+    - location: scripts/aws_clear_instance.sh
+      runas: root
+      timeout: 1000
   AfterInstall:
     - location: scripts/aws_install_dependencies.sh
       runas: root

scripts/aws_clear_instance.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+
+echo "Removing application and dependencies"
+
+if [ -d "/home/notify-app/notifications-api" ]; then
+    # Remove and re-create the directory
+    rm -rf /home/notify-app/notifications-api
+    mkdir -vp /home/notify-app/notifications-api
+    # Remove installed py3 packages
+    pip3 freeze | xargs pip3 uninstall -y
+else
+    echo "Directory does not exist, something went wrong!"
+fi
+