maybe it's about perms?

docker-compose.yml

@@ -7,10 +7,12 @@ services:
       args:
         UID: ${UID}
         GID: ${GID}
+    # for the volumes below, ensure the server user has write access
+    # "server user" is the user that UID and GID's are passed with env variables
     volumes:
-      - ./data:/data
-      - ./docs:/var/www/docs
-      - ./deploys:/var/www/deploys
+      - ./volumes/data:/data # SQLite DB
+      - ./volumes/docs:/var/www/docs # published files
+      - ./volumes/deploys:/var/www/deploys # releases
     ports:
       - "${HOST}:${PORT}:8080"
     user: "${UID}:${GID}"