Allow APP_VERSION to be empty string + dockerFile fix (#10900)

# Introduction
No choice but to allow APP_VERSION to be an empty string as it's though
to dynamically define dockerfile env vars

packages/twenty-docker/twenty/entrypoint.sh

@@ -1,11 +1,6 @@
 #!/bin/sh
 set -e
 
-# Set APP_VERSION only if it has a value
-if [ ! -z "${APP_VERSION}" ]; then
-    export APP_VERSION="${APP_VERSION}"
-fi
-
 # Check if the initialization has already been done and that we enabled automatic migration
 if [ "${DISABLE_DB_MIGRATIONS}" != "true" ] && [ ! -f /app/docker-data/db_status ]; then
     echo "Running database setup and migrations..."