Missing escaped newline

Dockerfile

@@ -50,7 +50,7 @@ RUN cp ${WEB_REPO}/config.dist.php ${WEB_REPO}/config.php && \
     sed -i -e "s/\['host'\] = 'localhost'/\['host'\] = 'mysql'/" \
     -e "s/\['user'\] = 'phpipam'/\['user'\] = getenv(\"MYSQL_ENV_MYSQL_USER\")/" \
     -e "s/\['pass'\] = 'phpipamadmin'/\['pass'\] = getenv(\"MYSQL_ENV_MYSQL_PASSWORD\")/" \
-    -e "s/\['port'\] = 3306;/\['port'\] = 3306;\n\n\$password_file = getenv(\"MYSQL_ENV_MYSQL_PASSWORD_FILE\");\nif(file_exists(\$password_file))\n\$db\['pass'\] = preg_replace(\"\/\\\\s+\/\", \"\", file_get_contents(\$password_file));/"
+    -e "s/\['port'\] = 3306;/\['port'\] = 3306;\n\n\$password_file = getenv(\"MYSQL_ENV_MYSQL_PASSWORD_FILE\");\nif(file_exists(\$password_file))\n\$db\['pass'\] = preg_replace(\"\/\\\\s+\/\", \"\", file_get_contents(\$password_file));/" \
     ${WEB_REPO}/config.php
 
 EXPOSE 80