docker-compose, readme: s/HOST/HOST_URL/

HOST is an already taken env variable

Signed-off-by: Gunwant Jain <mail@wantguns.dev>

docker-compose.yml

@@ -7,6 +7,6 @@ services:
       - 127.0.0.1:6162:6162
     environment:
       - ROCKET_PORT=6162  # Port the app uses
-      - HOST=localhost:6162 # or bin.example.com 
+      - HOST_URL=localhost:6162 # or bin.example.com 
     volumes:
       - ./upload:/app/upload  # upload folder will have your pastes

readme.md

@@ -56,7 +56,7 @@ Deployment
      environment:
        - ROCKET_PORT=6162
        - THEME=
-       - HOST=${BIN_DOMAIN}
+       - HOST_URL=${BIN_DOMAIN}
      volumes:
        - /path/to/local/upload:/app/upload
      labels: