1. Install snapd & a web server (caddy in this guide)

```
sudo apt update && sudo apt install --yes snapd caddy
```


2. Start snapd systemd unit

```
sudo systemctl start snapd
```


3. Install Nextcloud snap

```
sudo snap install nextcloud
```


4. Initialize Nextcloud snap and create admin account

```
sudo /snap/bin/nextcloud.manual-install USER PASSWORD
```


5. Set trusted domains in Nextcloud

```
sudo /snap/bin/nextcloud.occ config:system:set trusted_domains NUMBER --value=DOMAIN
```


6. Set Nextcloud HTTP & HTTPS ports to 8080 & 4443

```
sudo snap set nextcloud ports.http=8080
```

```
sudo snap set nextcloud ports.https=4443
```


7. Create (or add to) a Caddyfile to reverse proxy to Nextcloud

```
nano /path/to/Caddyfile
```

```
DOMAIN {
reverse_proxy   localhost:8080

rewrite /.well-known/carddav    /remote.php/dav
rewrite /.well-known/caldav     /remote.php/dav
rewrite /.well-known/webfinger  /public.php?service=webfinger
}
```


8. Stop Caddy systemd service & change Caddyfile path

```
sudo systemctl stop caddy
```

```
cat /usr/lib/systemd/system/caddy.service | \
sed "s|/etc/caddy/Caddyfile|/path/to/Caddyfile|g" | \
sudo tee /usr/lib/systemd/system/caddy.service &> /dev/null
```


9. Reload systemd daemon and restart Caddy

```
sudo systemctl daemon-reload
```

```
sudo systemctl start caddy
```