Fix 'tk show' and 'tk diff' in docker image

Busybox less does not support `--RAW-CONTROL-CHARS`; `tk show` and `tk diff` fail in an unmodified alpine image.
grafana · Mar 5, 2020 · c5e0299 · c5e0299
1 parent bf34367
commit c5e0299
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/Dockerfile b/Dockerfile
@@ -1,4 +1,8 @@
 FROM alpine
+
+# less with `--RAW-CONTROL-CHARS` is required for tk show/ tk diff
+RUN apk add --no-cache less
+
 COPY tk /usr/local/bin/tk
 ENTRYPOINT ["/usr/local/bin/tk"]