Docker test: Use busybox image to unzip

docker/Dockerfile.test

@@ -1,15 +1,20 @@
-FROM ghcr.io/openconext/openconext-basecontainers/php82-apache2:latest
-ADD output.tar /var/www/html/
+FROM busybox AS unpack
+WORKDIR /unpack
+COPY output.zip /unpack
+RUN unzip /unpack/output.zip
 
+FROM ghcr.io/openconext/openconext-basecontainers/php82-apache2:latest
 # Set the default workdir
 WORKDIR /var/www/html
+# Copy the files unpacked in stage unpack
+COPY --from=unpack  /unpack/ /var/www/html/
 # Add the application configuration files
 COPY config/openconext/parameters.yaml.dist config/openconext/parameters.yaml
 COPY config/openconext/institutions.yaml.dist config/openconext/institutions.yaml
 COPY config/packages/prod/monolog.yaml.docker config/packages/prod/monolog.yaml
 
 # Add the config files for Apache2
-RUN rm -rf /etc/apache2/sites-enabled/*
+RUN rm -rf /etc/apache2/sites-enabled/* && rm -rf /var/www/html/output.zip
 COPY ./docker/conf/azuremfa-apache2.conf /etc/apache2/sites-enabled/azuremfa.conf
 RUN rm -rf /var/www/html/var/cache/prod && chown -R www-data /var/www/html/var
 EXPOSE 80