I'm looking for an easy way to upload files from my Android smartphone to my home server. is there a - ideally dockerized - solution for that? Some simple web GUI where I can click on "Upload" and the files will be saved to a certain directory on my home server?

EDIT: I should've added that I want to do this remotely and not in my local network. I want to be able to send files from my Android smartphone from anywhere via the internet to my home server. That's why I thought about a services hosted on my server, which frontend I could access through my smartphone. But I might've answered my question already with the following: https://github.com/zer0tonin/Mikochi

EDIT #2: Thanks guys, I ended up creating my own Docker container running nextcloudcmd inspired by this: https://github.com/juanitomint/nextcloud-client-docker But I built the container from scratch and it's very minimalistic. I can publish it on my Gitlab when it's somewhat ready. Here's a little preview.

Dockerfile

FROM alpine:latest
RUN apk update && apk add nextcloud-client
COPY nc.sh .
RUN chmod +x ./nc.sh
VOLUME /data
CMD ./nc.sh

nc. sh (How can I prevent automatic hyperlinking?)

#!/bin/sh
while true
do
        nextcloudcmd /data https://${username}:${passwort}@${nextcloud-domain}
        sleep 300
done