dendrite version from commit hash (#1221)

this pr computes dendrite docker version from the commit hash, instead
of bumping versions. the previous setup caused issues and conflicts when
branch protection is enabled. this way we can seamlessly keep pushing to
main and it will keep getting built and published

get-version.sh

@@ -1,4 +1,3 @@
 #!/usr/bin/env bash
 
-# This script is used to extract the version string from the package.json file
-echo "$(cat package.json | grep version | head -1 | awk -F: '{ print $2 }' | sed 's/[",]//g' | tr -d '[[:space:]]')" 
+echo $(git log -1 --pretty=%h)

package.json

@@ -1,4 +0,0 @@
-{
-  "name": "@herenotthere/dendrite-monolith",
-  "version": "1.0.38"
-}