feat(docker)!: save MongoDB in volume (#264)

README.md

@@ -11,11 +11,16 @@ The easiest way to start Chronicle is by using our supplied Dockerfile.
 First you need to setup the correct permissions for the node's database:
 
 ```sh
-mkdir docker/alphanet
-
+mkdir docker/hornet_data
 groupadd -g 65532 nonroot
 useradd -g nonroot -u 65532 nonroot
-chown nonroot:nonroot docker/alphanet/
+chown nonroot:nonroot docker/hornet_data/
+```
+
+We mount the MongoDB database as an additional volume, with appropriate permissions:
+```sh
+mkdir docker/chronicle_data
+chown 999:999 docker/chronicle_data/
 ```
 
 After that, with Docker installed on your system, you can spin up Chronicle by running the following command from the root of the repository.

docker/docker-compose.hornet.yml

@@ -5,6 +5,8 @@ services:
     image: mongo
     restart: always
     command: --quiet --logpath /dev/null
+    volumes:
+      - ./chronicle_data:/data/db
 
   inx-chronicle:
     build:
@@ -41,7 +43,7 @@ services:
     cap_drop:
       - ALL
     volumes:
-      - ./alphanet:/app/alphanet
+      - ./hornet_data:/app/alphanet
       - ./config.hornet.json:/app/config.json:ro
     command:
       - "-c"