add docker readme

.env.example

@@ -1,5 +1,5 @@
 NET_ID=42
-RPC_URL=https://kovan.infura.io/v3/a3f4d001c1fc4a359ea70dd27fd9cb51
+RPC_URL=https://kovan.infura.io
 PRIVATE_KEY=
 # 2.5 means 2.5%
 RELAYER_FEE=2.5

.gitignore

@@ -1,3 +1,5 @@
 .vscode
 node_modules/
-.env
+.env
+.env.mainnet
+.env.kovan

README.md

@@ -14,11 +14,27 @@ Relayer should return a transaction hash.
 
 *Note.* If you want to change contracts' addresses go to [config.js](./config.js) file.
 
-## Deploy as a Docker container
+## Deploy with docker-compose
+
+docker-compose.yml contains a stack that will automatically provision SSL certificates for your domain name and will add a https redirect to port 80.
+
+1. Download docker-compose.yml
+2. Change environment variables for `kovan` containers as appropriate
+    * add `PRIVATE_KEY` for your relayer address
+    * set `VIRTUAL_HOST` and `LETSENCRYPT_HOST` to your domain and add DNS record pointing to your relayer ip address
+    * customize `RELAYER_FEE`
+    * update `RPC_URL` if needed
+3. Run `docker-compose up -d`
+
+## Run as a Docker container
+
 1. `cp .env.example .env`
 2. Modify `.env` as needed
 3. `docker run -d --env-file .env -p 80:8000 tornadocash/relayer`
 
+In that case you will need to add https termination yourself because browsers with default settings will prevent https 
+tornado.cash UI from submitting your request over http connection
+
 ## Input data example
 ```json
 {

docker-compose.yml

@@ -0,0 +1,32 @@
+version: '2'
+services:
+  kovan:
+    image: tornadocash/relayer
+    restart: always
+    env_file: ./.env.kovan
+    environment:
+      VIRTUAL_HOST: example.duckdns.org
+      LETSENCRYPT_HOST: example.duckdns.org
+      NET_ID: 42
+      RPC_URL: https://kovan.infura.io
+      PRIVATE_KEY:
+      # 2.5 means 2.5%
+      RELAYER_FEE: 2.5
+  nginx:
+    image: jwilder/nginx-proxy
+    restart: always
+    ports:
+      - 80:80
+      - 443:443
+    volumes:
+      - /etc/nginx/certs
+      - /etc/nginx/vhost.d
+      - /usr/share/nginx/html
+      - /var/run/docker.sock:/tmp/docker.sock:ro
+  letsencrypt:
+    image: jrcs/letsencrypt-nginx-proxy-companion
+    restart: always
+    volumes_from:
+      - nginx
+    volumes:
+      - /var/run/docker.sock:/var/run/docker.sock:ro