Fix docker, remove debug output from ifmarchive class

Signed-off-by: Marco Dickert <marco@misterunknown.de>

docker/.dockerignore

@@ -1,3 +0,0 @@
-*
-!ifm.php
-!docker-startup.sh

docker/Dockerfile

@@ -1,34 +0,0 @@
-FROM php:7-cli-alpine
-
-# only necessary environment variables
-ENV IFM_ROOT_DIR="/var/www"    \
-    IFM_ROOT_PUBLIC_URL="/www" \
-    IFM_TMP_DIR="/tmp"
-
-# add missing extensions and dependencies
-RUN apk add --no-cache libbz2 libzip libcap sudo && \
-    apk add --no-cache --virtual .php-extension-build-deps bzip2 bzip2-dev libzip-dev && \
-    docker-php-ext-install bz2 zip && \
-    apk del --no-cache --purge .php-extension-build-deps
-
-# allow php binary to bind ports <1000, even if $USER != root
-RUN /usr/sbin/setcap CAP_NET_BIND_SERVICE=+eip /usr/local/bin/php
-
-# remove unnecessary users
-RUN deluser xfs && \
-    deluser www-data
-
-# sudo: workaround for https://bugzilla.redhat.com/show_bug.cgi?id=1773148
-RUN echo "Set disable_coredump false" > /etc/sudo.conf
-
-# prepare files
-RUN rm -rf /var/www/html && \
-    mkdir -p /usr/local/share/webapps/ifm && \
-    ln -s /var/www /usr/local/share/webapps/ifm/www
-COPY ifm.php /usr/local/share/webapps/ifm/index.php
-COPY docker-startup.sh /usr/local/bin
-
-# start php server
-WORKDIR /usr/local/share/webapps/ifm
-EXPOSE 80
-CMD /usr/local/bin/docker-startup.sh