Chaos Erupts

From the introduction:

This adventure can be run as a level 1 adventure for 5 players, or can be easily customized to a party of any size or level. It can work as a small side adventure in an existing campaign, as a standalone one-shot, or the start of a new adventure. Use the links to the tools in their relevant section to customize the adventure to your party.

If running for a group of level 1s, you can optionally have everyone start with a healing potion and point of inspiration if you need to make it a bit easier, or give those as a reward for completing a challenge during the adventure if they need them.