feat: docker and redis setup, tests

script/test

@@ -7,10 +7,17 @@ set -euo pipefail
 #
 
 IMAGE=${IMAGE:-"andrejusk/dotfiles"}
-tag=${TAG:-$(cat /proc/sys/kernel/random/uuid)}
+uuid=$(
+    uuidgen 2> /dev/null \
+    || cat /proc/sys/kernel/random/uuid 2> /dev/null \
+    || echo $RANDOM
+)
+tag=${TAG:-"$uuid"}
+
+echo "Building $IMAGE:$tag"
 
 docker build . \
-    --build-arg UUID=$tag \
+    --build-arg UUID=$uuid \
     --cache-from $IMAGE \
     --tag $IMAGE:$tag \
     --target test