Fix docker, remove debug output from ifmarchive class

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

Dockerfile

@@ -0,0 +1,38 @@
+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 && \
+    mkdir -p /usr/src/ifm
+COPY compiler.php src/ /usr/src/ifm/
+RUN /usr/src/ifm/compiler.php --languages=all && \
+    cp /usr/src/ifm/dist/simple.ifm.php /usr/local/share/webapps/ifm/index.php
+
+COPY docker/docker-startup.sh /usr/local/bin
+
+# start php server
+WORKDIR /usr/local/share/webapps/ifm
+EXPOSE 80
+CMD /usr/local/bin/docker-startup.sh