I think I did find a solution. Did add every content-file as a single file.
collections: # A list of collections the CMS should be able to edit
- label: "Inhalt"
name: "inhalt"
files:
- label: "Home"
name: "home"
file: "/content/home.md"
fields: # The fields each document in this collection have
- {label: "Title", name: "title", widget: "string"}
- {label: "Body", name: "body", widget: "markdown"}
- label: "TCM"
name: "tcm"
file: "/content/tcm.md"
fields: # The fields each document in this collection have
- {label: "Title", name: "title", widget: "string"}
- {label: "Body", name: "body", widget: "markdown"}
- label: "Psycho"
name: "psycho"
file: "/content/psycho.md"
fields: # The fields each document in this collection have
- {label: "Title", name: "title", widget: "string"}
- {label: "Body", name: "body", widget: "markdown"}