Add Sphinx Relay opt fragment (#458)

* Add Sphinx Relay opt fragment

* Integrate keysend via existing opt

* Mount lnd datadir readonly

* Update Sphinx Relay and env vars

* Add Sphinx Relay docs

* Update Sphinx Relay

Production/nginx.tmpl

@@ -93,7 +93,17 @@
 		proxy_pass http://btctransmuter;
 	}
 		{{ end }}
-		
+
+  {{ if (eq $serviceName "sphinxrelay") }}
+  location /sphinxrelay/ {
+    proxy_set_header        Host               $host;
+    proxy_set_header        X-Real-IP          $remote_addr;
+    proxy_set_header        X-Forwarded-For    $proxy_add_x_forwarded_for;
+    proxy_set_header        X-Forwarded-Proto  $scheme;
+    proxy_pass http://sphinxrelay:3300/;
+  }
+  {{ end }}
+
 		{{ if (eq $serviceName "configurator") }}
 	location /configurator/ {
 		proxy_set_header Connection "";

README.md

@@ -173,6 +173,7 @@ Available `BTCPAYGEN_ADDITIONAL_FRAGMENTS` currently are:
 * [opt-add-configurator](docker-compose-generator/docker-fragments/opt-add-configurator.yml), to integrate the [BTCPay Server Configurator](https://install.btcpayserver.org) to manage your BTCPay deployment through a UI, and to allow new deployments elsewhere easily.
 * [opt-add-pihole](docker-compose-generator/docker-fragments/opt-add-pihole.yml) ([See the documentation](docs/pihole.md))
 * [opt-add-ndlc](docker-compose-generator/docker-fragments/opt-add-ndlc.yml) ([See the documentation](docs/ndlc.md))
+* [opt-add-sphinxrelay](docker-compose-generator/docker-fragments/opt-add-sphinxrelay.yml) for [Sphinx Relay](https://github.com/stakwork/sphinx-relay). Maintained by [dennisreimann](https://github.com/dennisreimann).
 * [opt-add-thunderhub](docker-compose-generator/docker-fragments/opt-add-thunderhub.yml) for a LND Lightning Node Manager in your Browser. Maintained by [apotdevin](https://github.com/apotdevin).
 * [opt-add-teos](docker-compose-generator/docker-fragments/opt-add-teos.yml) for [The Eye Of Satoshi](https://github.com/talaia-labs/python-teos), a BOLT13 Lightning Watchtower. Use port 9814 on your server or Tor to connect.
 * [opt-add-zammad](docker-compose-generator/docker-fragments/opt-add-zammad.yml) for [Zammad](https://zammad.com/features), a web based open source helpdesk/customer support system with many features to manage customer communication via several channels like telephone, facebook, twitter, chat and e-mails
@@ -377,6 +378,7 @@ We are trying to update our dependencies to run on `arm32v7` and `x64` boards. H
 | traefik | latest | [✔️](https://raw.githubusercontent.com/containous/traefik-library-image/master/scratch/Dockerfile) | ️❌ | ️❌ | [Github](https://github.com/containous/traefik-library-image) - [DockerHub](https://hub.docker.com/_/traefik) |
 | chekaz/docker-trezarcoin | 0.13.0 | [✔️](https://raw.githubusercontent.com/ChekaZ/docker/master/trezarcoin/1.2.0/Dockerfile) | ️❌ | ️❌ | [Github](https://github.com/ChekaZ/docker) - [DockerHub](https://hub.docker.com/r/chekaz/docker-trezarcoin) |
 | romanornr/docker-viacoin | 0.15.2 | [✔️](https://raw.githubusercontent.com/viacoin/docker-viacoin/master/viacoin/0.15.2/docker-viacoin) | ️❌ | ️❌ | [Github](https://github.com/viacoin/docker-viacoin) - [DockerHub](https://hub.docker.com/r/romanornr/docker-viacoin) |
+| stakwork/sphinx-relay | 2.0.13 | [✔️](https://github.com/stakwork/sphinx-relay/blob/v2.0.13/Dockerfile) | ❌ | ❌ | [Github](https://github.com/stakwork/sphinx-relay) - [DockerHub](https://hub.docker.com/r/sphinxlightning/sphinx-relay/) |
 
 # FAQ
 

docker-compose-generator/docker-fragments/opt-add-sphinxrelay.yml

@@ -0,0 +1,39 @@
+version: "3"
+services:
+  btcpayserver:
+    environment:
+      BTCPAY_EXTERNALSERVICES: "Sphinx Relay:${BTCPAY_PROTOCOL:-https}://${BTCPAY_HOST}/sphinxrelay/app;"
+    volumes:
+      - "sphinxrelay_datadir:/etc/sphinxrelay_datadir"
+  lnd_bitcoin:
+    expose:
+      - "10009"
+  sphinxrelay:
+    image: sphinxlightning/sphinx-relay:v2.0.13
+    user: "0:0"
+    restart: unless-stopped
+    expose:
+      - "3300"
+    volumes:
+      - "sphinxrelay_datadir:/relay/.lnd"
+      - "lnd_bitcoin_datadir:/relay/lnd:ro"
+    environment:
+      NODE_ENV: production
+      NODE_IP: ${BTCPAY_HOST}/sphinxrelay
+      NODE_ALIAS: ${LIGHTNING_ALIAS}
+      LND_IP: lnd_bitcoin
+      LND_PORT: 10009
+      PORT: 3300
+      MACAROON_LOCATION: /relay/lnd/admin.macaroon
+      ROUTER_MACAROON_LOCATION: /relay/lnd/data/chain/bitcoin/mainnet/router.macaroon
+      SIGNER_MACAROON_LOCATION: /relay/lnd/data/chain/bitcoin/mainnet/signer.macaroon
+      TLS_LOCATION: /relay/lnd/tls.cert
+      LND_LOG_LOCATION: /relay/lnd/logs/bitcoin/mainnet/lnd.log
+      PUBLIC_URL: ${BTCPAY_PROTOCOL:-https}://${BTCPAY_HOST}/sphinxrelay/
+    links:
+      - lnd_bitcoin
+volumes:
+  sphinxrelay_datadir:
+required:
+  - "bitcoin-lnd"
+  - "opt-lnd-keysend"