Docs for using let's encrypt with cyphernode

doc/cyphernode-letsencrypt-companion.md

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+# Cyphernode + Let's Encrypt Companion
+
+Cyphernode has been built with a low-traffic semi-trusted usage in mind.  Expose it to the outside world at your own risk and peril.
+
+## Install Cyphernode
+
+```
+cd ; git clone https://github.com/SatoshiPortal/cyphernode.git
+cd cyphernode/
+git checkout features/lnfeats
+```
+
+### Adjust Cyphernode docker-compose
+
+```
+vi install/generator-cyphernode/generators/app/templates/installer/docker/docker-compose.yaml
+```
+
+(add environment in gatekeeper)
+```
+      - "VIRTUAL_PROTO=https"
+      - "VIRTUAL_HOST=cyphernode.yourdomain.com"
+      - "VIRTUAL_PORT=443"
+      - "LETSENCRYPT_HOST=cyphernode.yourdomain.com"
+      - "LETSENCRYPT_EMAIL=you@yourdomain.com"
+      ```
+
+```
+./build.sh
+./dist/setup.sh
+```
+
+(choose a different port for the gatekeeper, 443 will be used by the letsencrypt companion)
+
+## Install docker-compose
+
+```
+sudo curl -L "https://github.com/docker/compose/releases/download/1.23.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
+sudo chmod +x /usr/local/bin/docker-compose
+sudo ln -s /usr/local/bin/docker-compose /usr/bin/docker-compose
+```
+
+## Install and start letsencypt-companion
+
+```
+cd ; git clone https://github.com/buchdag/letsencrypt-nginx-proxy-companion-compose.git
+cd letsencrypt-nginx-proxy-companion-compose/2-containers/compose-v3/labels/
+vi docker-compose.yaml
+```
+
+(change network to cyphernodenet)
+
+```
+docker-compose up -d
+```
+
+## Start Cyphernode
+
+```
+cd ~/cyphernode/dist/
+./start.sh
+```
+
+## Web access Cyphernode
+
+https://cyphernode.yourdomain.com/status