muzak
2
Edit: Upgrade the client to Joplin v3.0.2 or later to use the trash feature.
The Github Releases page shows that the trash feature is available for v3.0.2 and later, which are currently pre-release versions.
The Dockerhub Tags page shows that the 2.14.2-beta tag you're using matches the latest Joplin Server version, which is the latest release version.
Using the trash feature may have to wait until a Docker image for v3.0.2 or later is created. Then, you can apply the appropriate tag to your Docker Compose.
Someone please correct me if I'm wrong about any of this.