build: add fietsje config and alias for Delve debugger

Test Plan: Debugged a running process using `bazel run :dlv`.

X-Origin-Diff: phab/D550
GitOrigin-RevId: 3bea727afc0cc275fac19238067d871c42beef19
diff --git a/BUILD b/BUILD
index 8da7909..c188aa9 100644
--- a/BUILD
+++ b/BUILD
@@ -85,3 +85,9 @@
     name = "kubectl",
     actual = "@io_k8s_kubernetes//cmd/kubectl:kubectl",
 )
+
+# Shortcut for the Delve debugger for interactive debugging
+alias(
+    name = "dlv",
+    actual = "@com_github_go_delve_delve//cmd/dlv:dlv",
+)