diff --git a/bin/run-docker.sh b/bin/run-docker.sh
index d21e8d1..6c0a8f6 100644
--- a/bin/run-docker.sh
+++ b/bin/run-docker.sh
@@ -21,7 +21,17 @@ if [ -z "$1" ]; then
 	print_usage_instructions
 fi
 
-BUILD_NO_CACHE=
+TAG=${TAG-latest}
+WP_VERSION=${WP_VERSION-5.6}
+PHP_VERSION=${PHP_VERSION-7.4}
+
+BUILD_NO_CACHE=${BUILD_NO_CACHE-}
+
+if [[ ! -f ".env" ]]; then
+  echo "No .env file was detected. .env.dist has been copied to .env"
+  echo "Open the .env file and enter values to match your local environment"
+  cp .env.dist .env
+fi
 
 subcommand=$1; shift
 case "$subcommand" in