Update Docker README file

docker/README.md

@@ -1,96 +1,59 @@
 # Docker
 
-## Initialization
+This directory contains the Dockerfiles used to build and release the official images and a `docker-compose.yml` file that is intended for end users to run a Mempool instance with minimal effort.
 
-In an empty dir create 2 sub-dirs
+## Basic setup
+
+To run an instance with the default settings, use the following command:
 
 ```bash
-mkdir -p data mysql/data
+$ docker-compose up
 ```
 
-Your dir should now look like that:
+The default configuration will allow you to run Mempool using `bitcoind` as the backend, so address lookups will be disabled.
 
-```bash
-$ls -R
-.:
-data mysql
+You can check if the instance is running by visiting http://localhost - the graphs will be populated as new transactions are detected.
 
-./data:
+## Advanced setup
 
-./mysql:
-data  db-scripts
+In order to run with electrum/electrs as the backend you will need to make the following changes to the `docker-compose.yml` file:
+
+- Under the `api` service, change the value of `MEMPOOL_BACKEND` key from `none` to `electrum`:
 
-./mysql/data:
 ```
-
-In the main dir add the following `docker-compose.yml`
-
-```bash
-version: "3.7"
-
-services:
-  web:
-    image: mempool/frontend:latest
-    user: "1000:1000"
-    restart: on-failure
-    stop_grace_period: 1m
-    command: "./wait-for db:3306 --timeout=720 -- nginx -g 'daemon off;'"
-    ports:
-      - 80:8080
-    environment:
-      FRONTEND_HTTP_PORT: "8080"
-      BACKEND_MAINNET_HTTP_HOST: "api"
   api:
-    image: mempool/backend:latest
-    user: "1000:1000"
-    restart: on-failure
-    stop_grace_period: 1m
-    command: "./wait-for-it.sh db:3306 --timeout=720 --strict -- ./start.sh"
-    volumes:
-      - ./data:/backend/cache
     environment:
-      RPC_HOST: "127.0.0.1"
-      RPC_PORT: "8332"
-      RPC_USER: "mempool"
-      RPC_PASS: "mempool"
-      ELECTRUM_HOST: "127.0.0.1"
+      MEMPOOL_BACKEND: "none"
+```
+
+- Under the `api` service, set the `ELECTRUM_HOST` and `ELECTRUM_PORT` keys to your Docker host ip address and set `ELECTRUM_TLS_ENABLED` to `false`:
+
+```
+  api:
+    environment:
+      ELECTRUM_HOST: "172.27.0.1"
       ELECTRUM_PORT: "50002"
       ELECTRUM_TLS: "false"
-      MYSQL_HOST: "db"
-      MYSQL_PORT: "3306"
-      MYSQL_DATABASE: "mempool"
-      MYSQL_USER: "mempool"
-      MYSQL_PASS: "mempool"
-      BACKEND_MAINNET_HTTP_PORT: "8999"
-      CACHE_DIR: "/backend/cache"
-      MEMPOOL_CLEAR_PROTECTION_MINUTES: "20"
-  db:
-    image: mariadb:10.5.8
-    user: "1000:1000"
-    restart: on-failure
-    stop_grace_period: 1m
-    volumes:
-      - ./mysql/data:/var/lib/mysql
-      - ./mysql/db-scripts:/docker-entrypoint-initdb.d
-    environment:
-      MYSQL_DATABASE: "mempool"
-      MYSQL_USER: "mempool"
-      MYSQL_PASSWORD: "mempool"
-      MYSQL_ROOT_PASSWORD: "admin"
-
 ``` 
 
-You can update all the environment variables inside the API container, especially the RPC and ELECTRUM ones
+You can update any of the settings in the `mempool-config.json` file using the environment variables to override. Refer to the `start.sh` script for a list of variables and their default values.
 
-## Run it
+## Troubleshooting
 
-To run our docker-compose use the following cmd:
-
-```bash
-docker-compose up
-```
-
-If everything went okay you should see the beautiful mempool :grin:
+If you already have something running on port 80, change it to something else under the `web` service section. 
 
 If you get stuck on "loading blocks", this means the websocket can't connect.
-Check your nginx proxy setup, firewalls, etc. and open an issue if you need help.
+
+If you can't connect to the `bitcoind` RPC server, check your firewall settings and your `bitcoin.conf` file, it should contain at least these settings:
+
+```
+rpcallowip=0.0.0.0/0
+rpcuser=mempool
+rpcpassword=mempool
+bind=0.0.0.0:8333
+rpcbind=0.0.0.0:8332
+```
+
+If you can't connect to electrum/electrs, check your firewall settings and the IP you entered.
+
+If you see a permission denied error coming from the database container, check your filesystem. The cache files generated by the backend will be stored in the `./data` directory and the database will be stored in the `./mysql/data` directory relative to the location of the `docker-compose.yml` file. If you move it somewhere, the paths will have to be updated and/or recreated.