Bump versions

Dockerfile

@@ -1,23 +1,22 @@
-FROM debian:9-slim
+FROM debian:10-slim
 
 
-# Define image metadata
 LABEL maintainer="inf_sfb1288@lists.uni-bielefeld.de"
 
 
 ENV LANG=C.UTF-8
 
 
-# Install prerequisites
 RUN apt-get update \
  && apt-get install -y --no-install-recommends \
       imagemagick \
-      python3.5 \
-      zip \
- && rm -rf /var/lib/apt/lists/*
+      python3.7 \
+      zip
+
+
+RUN rm -rf /var/lib/apt/lists/*
 
 
-# Install merge_images
 COPY file_setup /usr/local/bin
 
 

file_setup

@@ -1,4 +1,4 @@
-#!/usr/bin/env python3.5
+#!/usr/bin/env python3.7
 # coding=utf-8
 
 
@@ -45,7 +45,7 @@ def merge_images(input_dir, output_dir, output_file_base, zip):
         cmd += ' && '
         cmd += 'zip'
         cmd += ' -m'
-        cmd += ' "{}" "{}".pdf'.format(zip, output_file_base)
+        cmd += ' "{}".zip "{}".pdf'.format(zip, output_file_base)
         cmd += ' && '
         cmd += 'cd -'
         subprocess.run(cmd, shell=True)