specify program versions to prevent future breakage

entrypoint.sh

@@ -2,10 +2,14 @@
 
 set -eu -o pipefail
 
-apk add --upgrade --no-cache bash restic python3 py3-pip
+apk add --upgrade --no-cache \
+    bash=5.2.15-r5 \
+    restic=0.15.2-r2 \
+    python3=3.11.5-r0 \
+    py3-pip=23.1.2-r0
 
 # Todo use requirements file with specific versions
-pip install click docker resticpy
+pip install click==8.1.7 docker==6.1.3 resticpy==1.0.2
 
 if [ -n "$SSH_HOST_KEY" ]
 then