Fix incorrect port mapping in docker-compose

Fixed an incorrect port mapping the the docker-compose example as well
as added a restart attribute, since it's most likely a good use case to
always keep the server up and running, even if it fails or the host is
updated/restarted.

Also added a missing end parenthesis in the table of env variables.

README.md

@@ -33,11 +33,12 @@ The features of wg-manager includes:
   wireguard:
     container_name: wg-manager
     image: perara/wg-manager
+    restart: always
     cap_add:
       - NET_ADMIN
     #network_mode: host # Alternatively
     ports:
-       - 51800:51900/udp
+       - 51800-51900:51800-51900/udp
        - 8888:8888
     volumes:
       - ./wg-manager:/config
@@ -63,9 +64,9 @@ When docker container/server has started, go to http://localhost:8888
 
 # Environment variables
 | Environment      | Description                                                               | Recommended |
-|------------------|--------------------------------------------------------------------------|-------------|
+|------------------|---------------------------------------------------------------------------|-------------|
 | GUNICORN_CONF    | Location of custom gunicorn configuration                                 | default     |
-| WORKERS_PER_CORE | How many concurrent workers should there be per available core (Gunicorn | default     |
+| WORKERS_PER_CORE | How many concurrent workers should there be per available core (Gunicorn) | default     |
 | WEB_CONCURRENCY  | The number of worker processes for handling requests. (Gunicorn)          | 1           |
 | HOST             | 0.0.0.0 or unix:/tmp/gunicorn.sock if reverse proxy. Remember to mount    | 0.0.0.0     |
 | PORT             | The port to use if running with IP host bind                              | 80          |