adding arm32v7 dockerfile

Dockerfile.arm32v7

@@ -0,0 +1,67 @@
+FROM arm32v7/alpine:latest
+
+ARG WALLABAG_VERSION=2.3.8
+
+RUN apk add gnu-libiconv --update-cache --repository http://dl-cdn.alpinelinux.org/alpine/edge/community/armv7/ --allow-untrusted
+ENV LD_PRELOAD /usr/lib/preloadable_libiconv.so php
+
+RUN set -ex \
+ && apk update \
+ && apk upgrade --available \
+ && apk add \
+      ansible \
+      curl \
+      git \
+      libwebp \
+      mariadb-client \
+      nginx \
+      pcre \
+      php7 \
+      php7-amqp \
+      php7-bcmath \
+      php7-ctype \
+      php7-curl \
+      php7-dom \
+      php7-fpm \
+      php7-gd \
+      php7-gettext \
+      php7-iconv \
+      php7-json \
+      php7-mbstring \
+      php7-openssl \
+      php7-pdo_mysql \
+      php7-pdo_pgsql \
+      php7-pdo_sqlite \
+      php7-phar \
+      php7-session \
+      php7-simplexml \
+      php7-tokenizer \
+      php7-xml \
+      php7-zlib \
+      php7-sockets \
+      php7-xmlreader \
+      php7-tidy \
+      py-mysqldb \
+      py-psycopg2 \
+      py-simplejson \
+      rabbitmq-c \
+      s6 \
+      tar \
+      tzdata \
+ && rm -rf /var/cache/apk/* \
+ && ln -sf /dev/stdout /var/log/nginx/access.log \
+ && ln -sf /dev/stderr /var/log/nginx/error.log \
+ && curl -s https://getcomposer.org/installer | php \
+ && mv composer.phar /usr/local/bin/composer \
+ && git clone --branch $WALLABAG_VERSION --depth 1 https://github.com/wallabag/wallabag.git /var/www/wallabag
+
+COPY root /
+
+RUN set -ex \
+ && cd /var/www/wallabag \
+ && SYMFONY_ENV=prod composer install --no-dev -o --prefer-dist --no-progress \
+ && chown -R nobody:nobody /var/www/wallabag
+
+EXPOSE 80
+ENTRYPOINT ["/entrypoint.sh"]
+CMD ["wallabag"]