feat: use linuxserver based docker image

docker/root/defaults/settings.json

@@ -0,0 +1,8 @@
+{
+  "port": 80,
+  "baseURL": "",
+  "address": "",
+  "log": "stdout",
+  "database": "/database.db",
+  "root": "/srv"
+}

docker/root/etc/cont-init.d/20-config

@@ -0,0 +1,15 @@
+#!/usr/bin/with-contenv bash
+
+# make folders
+mkdir -p /database
+
+# copy config
+if [ ! -f "/config/settings.json" ]; then
+  cp -a /defaults/settings.json /config/settings.json
+fi
+
+# permissions
+chown abc:abc \
+	/config/settings.json \
+	/database \
+	/srv

docker/root/etc/services.d/filebrowser/run

@@ -0,0 +1,3 @@
+#!/usr/bin/with-contenv bash
+
+exec s6-setuidgid abc filebrowser -c /config/settings.json -d /database/filebrowser.db;