diff --git a/src/Dockerfile b/src/Dockerfile
index 7f711da..d452acf 100644
--- a/src/Dockerfile
+++ b/src/Dockerfile
@@ -1,11 +1,14 @@
 FROM restic/restic:0.9.6
 
-RUN apk update && apk add python3 dcron mariadb-client postgresql-client
+RUN apk update && apk add ca-certificates python3 dcron mariadb-client postgresql-client && rm -rf /var/cache/apk/*
 
 ADD . /restic-compose-backup
 WORKDIR /restic-compose-backup
 RUN pip3 install -U pip setuptools wheel && pip3 install -e .
 ENV XDG_CACHE_HOME=/cache
 
-ENTRYPOINT []
-CMD ["./entrypoint.sh"]
+VOLUME ["/usr/local/share/ca-certificates"]
+
+ENTRYPOINT ["./entrypoint.sh"]
+
+CMD []
diff --git a/src/entrypoint.sh b/src/entrypoint.sh
index a223b7b..bfc8c0d 100755
--- a/src/entrypoint.sh
+++ b/src/entrypoint.sh
@@ -1,11 +1,38 @@
 #!/bin/sh
 
-# Dump all env vars so we can source them in cron jobs
-printenv | sed 's/^\(.*\)$/export \1/g' > /env.sh
+set -e
 
-# Write crontab
-rcb crontab > crontab
+setup_cacerts(){
 
-# start cron in the foreground
-crontab crontab
-crond -f
+  update-ca-certificates
+}
+
+dump_env(){
+
+  # Dump all env vars so we can source them in cron jobs
+  printenv | sed 's/^\(.*\)$/export \1/g' > /env.sh
+}
+
+setup_crontab(){
+
+  # Write crontab
+  rcb crontab > crontab
+
+  # start cron in the foreground
+  crontab crontab
+  crond -f
+}
+
+start_app(){
+  
+  setup_cacerts
+
+  if [ "$1" = '' ]; then
+    dump_env
+    setup_crontab
+  else
+    exec "$@"
+  fi
+}
+
+start_app "$@"