fix: only check dc when changed

.gitignore

@@ -1,2 +1,4 @@
 # development
-servers/ryuk
+servers/ryuk
+# tempfiles
+.neb/

tools/repo/check.d/90-docker-compose-config.sh

@@ -3,6 +3,13 @@
 set -e
 
 for s in servers/*; do
+    sum="$(cat $s/docker-compose.d/*.yml | sha1sum)"
+    if [ -f .neb/$s/dc-sum.txt ]; then
+      [ "$(cat .neb/$s/dc-sum.txt)" = "$sum" ] && continue
+    else
+      mkdir -p .neb/$s
+    fi
     echo "checking $s..."
     HOSTNAME=$(echo $s | sed 's/servers\///') bash tools/server-docker-compose.sh config -q
+    echo "$sum" > .neb/$s/dc-sum.txt
 done