Set docker image default port also to 8000

So that rest-server can be started as non-root user.  You can choose
which port to expose, anyway.

Dockerfile

@@ -9,7 +9,7 @@ COPY rest-server docker/*_user /usr/bin/
 
 VOLUME /data
 
-EXPOSE 80
+EXPOSE 8000
 
 COPY docker/entrypoint.sh /entrypoint.sh
 

README.md

@@ -113,7 +113,7 @@ Persistent data volume is located to `/data`.
 #### Start server
 
 ```
-docker run -p 80:80 -v /my/data:/data --name rest_server restic/rest-server
+docker run -p 8000:8000 -v /my/data:/data --name rest_server restic/rest-server
 ```
 
 It's suggested to set a container name to more easily manage users (see next section).

docker/entrypoint.sh

@@ -16,4 +16,4 @@ else
     rm -f "$PASSWORD_FILE"
 fi
 
-exec rest-server --listen ":80" $OPTIONS --path "$DATA_DIRECTORY"
+exec rest-server --path "$DATA_DIRECTORY" $OPTIONS