Add revision to version string (#3147)

Since the removal of `build.sh`, we don't include any information about
the revision Dendrite was build from. Since go1.18, the revision a
binary was build from is automatically included, so we can try to get
that instead.

This also adds a `dendrite_up` metric showing the current version
(`dendrite_up{version="0.13.1+c796f20"} 1`)

Closes #2993

1 files changed, 1 insertions, 1 deletions

diff --git a/Dockerfile b/Dockerfile
index 2487ea5b..4ee20933 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,7 +4,7 @@
 # base installs required dependencies and runs go mod download to cache dependencies
 #
 FROM --platform=${BUILDPLATFORM} docker.io/golang:1.20-alpine AS base
-RUN apk --update --no-cache add bash build-base curl
+RUN apk --update --no-cache add bash build-base curl git
 
 #
 # build creates all needed binaries