Docker container build fails on 'undefined: pometheus.Handler' in redoctober.go line 27

[jtmorrisbytes]

(trying to reference the current commit)
99c99a8

It looks like prometheus has changed its dependency tree, and when I download the repo from this commit and run 'make' it fails with the above error.

updating prometheus:

- import "github.com/prometheus/client_golang/prometheus"
+  import "github.com/prometheus/client_golang/prometheus/promhttp"

and changing line 27

- Handler: prometheus.Handler()
+ Handler: promhttp.Hanlder()

fixes the error, but then introduces new dependency issues.
The build then fails on go version 1.7 due to the missing math/bits standard library.
Updating to go 1.9 fixes the math/bits dependency but is missing bits.Add64 and bits.Mul64
Updating to go 1.12 fixes the dependency issues without breaking dep

Conclusion: updating to go 1.12 and the above patches allows the container to build and run
Should I submit a pull request with the above changes?

[nickysemenza]

ah so looking at the linked commit we're running tests on 1.12, but the dockerfile (which make runs) has a much older version?

bumping prometheus, and go to 1.12 sounds great, but also if migrating from dep to modules is easy go 1.17 is great too! (assuming there's not more breaking changes to stdlib)