Use triliumnext/notes as image in docker-compose.yml

Also added comments to `docker-compose.yml` and removed unused volumes

docker-compose.yml

@@ -1,16 +1,23 @@
+# TL;DR:
 # Running `docker-compose up` will create/use the "trilium-data" directory in the user home
 # Run `TRILIUM_DATA_DIR=/path/of/your/choice docker-compose up` to set a different directory
-version: '2.1'
+# To run in the background, use `docker-compose up -d`
+
 services:
     trilium:
-    image: zadam/trilium
+        # Optionally, replace `latest` with a version tag like `v0.90.3`
-    restart: always
+        # Using `latest` may cause unintended updates to the container
+        image: triliumnext/notes:latest
+        # Restart the container unless it was stopped by the user
+        restart: unless-stopped
         environment:
             - TRILIUM_DATA_DIR=/home/node/trilium-data
         ports:
-      - "8080:8080"
+            # By default, Trilium will be available at http://localhost:8080
+            # It will also be accessible at http://<host-ip>:8080
+            # You might want to limit this with something like Docker Networks, reverse proxies, or firewall rules, such as UFW
+            - '8080:8080'
         volumes:
+            # Unless TRILIUM_DATA_DIR is set, the data will be stored in the "trilium-data" directory in the home directory.
+            # This can also be changed with by replacing the line below with `- /path/of/your/choice:/home/node/trilium-data
             - ${TRILIUM_DATA_DIR:-~/trilium-data}:/home/node/trilium-data
-
-volumes:
-  trilium: