add incident 045 about a fibre cut in ANS

documentation/INCIDENTS.md

@@ -1605,3 +1605,14 @@ Additionally the facility management called and said that there was "no internet
 The facility management will drive to the ANS and check in with me to talk about the next steps
 
 **solution**: after power cycling the gigacube the upstream came back
+
+
+045 2023.04.01 - 2023.04.02 (ANS) | fibre cut to tent-1
+-------------------------------------------------------
+
+**issue**: fibre cut from `facility management` container to `tent-1`
+
+**solution**: replace fibre with outdoor copper cable
+
+**dicussion**:
+* longterm: replace copper with fibre