fix dokuwiki plugin issues

dokuwiki/Dockerfile

@@ -8,11 +8,10 @@ MAINTAINER kev <noreply@datageek.info>
 WORKDIR /var/www/html
 
 RUN apk add -U nginx \
-               php-curl \
                php-fpm \
                php-openssl \
                php-xml \
-               php-zip \
+               php-zlib \
                tar \
     && wget -O- http://download.dokuwiki.org/src/dokuwiki/dokuwiki-stable.tgz | tar xz --strip 1 \
     && chown -R nobody:nobody . \

dokuwiki/README.md

@@ -23,11 +23,15 @@ $ docker run --rm --volumes-from dokuwiki -v `pwd`:/backup alpine tar czf /backu
 $ docker run --rm --volumes-from dokuwiki -v `pwd`:/backup alpine tar xzf /backup/dw-backup.tgz
 ```
 
-## Issues
+## Plugin
 
-Currently, **Extension Manager** doesn't work. Pull requests are welcome!
+You can install [plugins][2] via **Extension Manager**.
 
-You can install plugins manually.
+- [backup](https://www.dokuwiki.org/plugin:backup)
+- [emoji](https://www.dokuwiki.org/plugin:emoji)
+- [wrap](https://www.dokuwiki.org/plugin:wrap)
+
+You can also install them manually.
 
 ```
 $ docker exec -it dokuwiki sh
@@ -40,3 +44,4 @@ $ docker exec -it dokuwiki sh
 ```
 
 [1]: https://www.dokuwiki.org/dokuwiki
+[2]: https://www.dokuwiki.org/plugins