From 0a9ba0ce81a6bc83c5118ef51cdb9d201e700e23 Mon Sep 17 00:00:00 2001
From: Tammo Jan Dijkema <dijkema@astron.nl>
Date: Wed, 18 Mar 2020 18:32:13 +0100
Subject: [PATCH] Document secret slack file

---
 README.md | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 40f833d..bf6935c 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,12 @@
 # Slack bot for ASTRON/JIVE daily image
 
 Post the ASTRON/JIVE daily image from http://www.astron.nl/dailyimage/ to
-the #daily-image channel on the Astron Slack at radio-observatory.slack.com
\ No newline at end of file
+the #daily-image channel on the Astron Slack at radio-observatory.slack.com
+
+To use, put a file called `slack_secret` in the same directory as the main
+script, and put one line with a slack secret in this file. The slack secret
+should look like
+
+```
+T3XTAT1R3/K010AZ6BD2I/alqRFnPDndremLfc92aLd4sx
+```
-- 
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