added script to fetch / filter Hetzners SB offers

bash/hetzer_sb_notify.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+
+FILTER=$(mktemp)
+
+cat > ${FILTER} <<EOF
+    .server |
+    map(
+        select(
+            .hdd_size >= 3000 and
+            .ram >= 32 and
+            .bandwith >= 1000 and
+            .traffic == "unlimited" and
+            .cpu_benchmark >= 9000 and
+            (.setup_price | tonumber) == 0 and
+            (.price | tonumber) <= 50 and
+            (.specials | map(ascii_downcase ) | index("ssd"))
+        )
+    ) |
+    sort_by(.price | tonumber) | reverse
+EOF
+
+curl  https://www.hetzner.de/a_hz_serverboerse/live_data.json | jq -f $FILTER