allow to run as non-root (#246)

Signed-off-by: Zoey <zoey@z0ey.de>

README.md

@@ -67,11 +67,12 @@ so that the barrier for entry here is low.
 - Auto certbot old certs clean (FULLCLEAN=true)
 - Passwort reset (only sqlite) (`docker exec -it nginx-proxy-manager password-reset.js USER_EMAIL PASSWORD`)
 - TLS supported for MariaDB/MySQL, please set the `DB_MYSQL_TLS` env to true. If you use self signed certificates you can upload them for example to `/data/etc/npm/ca.crt` and set the `DB_MYSQL_CA` to `/data/etc/npm/ca.crt` (not tested)
+- PUID/GGID support in network mode host (please add `net.ipv4.ip_unprivileged_port_start=0` at the end of `/etc/sysctl.conf`)
 
 ## Soon
 - disabling IPv4/IPv6 ([1](https://github.com/NginxProxyManager/nginx-proxy-manager/blob/develop/docker/rootfs/etc/s6-overlay/s6-rc.d/prepare/40-dynamic.sh) / [2](https://github.com/NginxProxyManager/nginx-proxy-manager/blob/develop/docker/rootfs/etc/s6-overlay/s6-rc.d/prepare/50-ipv6.sh) / nginx templates (nginx.js lines 200-300))
 - custom IP-Bindings in nginx/backend to allow multiple instances in host network mode
-- support changing the PUID/PGID (maybe)
+- dark mode
 - more
 
 ## migration
@@ -79,7 +80,6 @@ so that the barrier for entry here is low.
 - if you use custom certificates, you need to upload the CA/Intermediate Certificate (file name: `chain.pem`) in the `/opt/npm/tls/custom/npm-[certificate-id]` folder
 - some buttons have changed, check if they are still correct
 - please delete all dnspod certs and recreate them OR you manually change the credentialsfile (see [here](https://github.com/ZoeyVid/nginx-proxy-manager/blob/develop/global/certbot-dns-plugins.js) for the template)
-- changing the PUID/PGID is not supported (since it would break running in network_mode host)
 
 # Use as webserver
 
@@ -136,10 +136,12 @@ services:
         network_mode: host
         volumes:
         - "/opt/npm:/data"
-#        - "/opt/npm-letsencrypt:/etc/letsencrypt" # Only needed for first time migration from original nginx-proxy-manager to this fork
 #        - "/var/www:/var/www" # optional, if you want to use it as webserver for html/php
+#        - "/opt/npm-letsencrypt:/etc/letsencrypt" # Only needed for first time migration from original nginx-proxy-manager to this fork
         environment:
-        - "TZ=Europe/Berlin"
+        - "TZ=Europe/Berlin" # set timezone
+#        - "PUID=1000" # set group id
+#        - "PGID=1000" # set user id
 #        - "NGINX_LOG_NOT_FOUND=true" # Allow logging of 404 errors
 #        - "NPM_LISTEN_LOCALHOST=true" # Bind the NPM Dashboard on Port 81 only to localhost
 #        - "NPM_CERT_ID=1" # ID of cert, which should be used instead of dummycerts