diff --git a/.env.example b/.env.example
index 482fa6d..f0959a7 100644
--- a/.env.example
+++ b/.env.example
@@ -1,5 +1,5 @@
-# Host port of the Drivers Hub API.
-HUB_PORT=7777
+# Address and port on the Docker host.
+BACKEND_BIND=127.0.0.1:17777
 
 DB_NAME=drivershub
 DB_PASSWORD=replace-with-a-long-random-password
diff --git a/Dockerfile b/Dockerfile
index 4f472d8..9839eab 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -36,6 +36,7 @@ RUN apt-get update \
 WORKDIR /app
 
 COPY --from=builder --chown=drivershub:drivershub /build/dist/ ./
+COPY --from=builder --chown=drivershub:drivershub /build/src/external_plugins/ ./external_plugins/
 COPY --chown=root:root docker/entrypoint.sh /usr/local/bin/drivershub-entrypoint
 
 USER drivershub
diff --git a/README.md b/README.md
index bb2174a..30fb489 100644
--- a/README.md
+++ b/README.md
@@ -27,7 +27,7 @@ Set secure MariaDB passwords in `.env`. Then, set at least these values in
 
 ```json
 {
-    "abbr": "drivershub",
+    "abbr": "api",
     "name": "Drivers Hub",
     "domain": "hub.example.com",
     "prefix": "/api",
@@ -39,7 +39,8 @@ Set secure MariaDB passwords in `.env`. Then, set at least these values in
     "db_name": "drivershub",
     "db_data_directory": "/var/lib/mysqlext/",
     "redis_host": "valkey",
-    "redis_port": 6379
+    "redis_port": 6379,
+    "external_plugins": ["client-config"]
 }
 ```
 
@@ -50,6 +51,8 @@ from `config_sample.json`. Restart the backend after you change
 Use the same database password in `.env` and `config/config.json`.
 Set `domain` to the public host name of the backend. Do not include a protocol or
 path.
+Set `prefix` to `/{abbr}` when you use the official frontend. The
+`client-config` plugin uses this relation to create frontend API URLs.
 
 ## Start the deployment
 
@@ -59,8 +62,9 @@ docker compose up -d
 docker compose ps
 ```
 
-By default, the API is available at `http://localhost:7777/api`. Swagger UI is
-available at `http://localhost:7777/api/doc`.
+By default, the API is available at `http://localhost:17777/api`. Swagger UI is
+available at `http://localhost:17777/api/doc`.
+The default bind address is suitable for a reverse proxy on the Docker host.
 
 ## Store persistent data
 
diff --git a/compose.yaml b/compose.yaml
index 280b38c..e8bbfb7 100644
--- a/compose.yaml
+++ b/compose.yaml
@@ -60,7 +60,7 @@ services:
     volumes:
       - ./config:/app/config
     ports:
-      - "${HUB_PORT:-7777}:7777"
+      - "${BACKEND_BIND:-127.0.0.1:17777}:7777"
     depends_on:
       db-init:
         condition: service_completed_successfully