add jerbuild

ober

7fd699ace1018f2fa2f52dd4e92974fe60caf4be

diff --git a/.jerbuild b/.jerbuild
new file mode 100644
index 0000000..a6df977
--- /dev/null
+++ b/.jerbuild
@@ -0,0 +1,7 @@
+;; Build jerboa-signal with a standalone jerbuild binary.
+
+(entry "signal/main.ss")
+(output "jerboa-signal")
+(requires "cc")
+(notes "Pure Jerboa CLI build. jerboa-native-rs and DuckDB are not required.")
+(libdirs ".")