Added markdown guide for installing Nextcloud Snap behind Caddy

nextcloud-snap-caddy-setup.md

@@ -0,0 +1,85 @@
+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
+```