devtools/docker_ci.sh: upgrade to go 1.15
That is what our frontend runs on.
Trust: Jonathan Amsterdam
Run-TryBot: Jonathan Amsterdam
TryBot-Result: kokoro
@@ -44,4 +44,4 @@ cd "${pkgsite_dir}"
${maybe_sudo}docker run --rm -t \
--network container:${pg_container} \
-v $(pwd):"/workspace" -w "/workspace" \
- -e GO_DISCOVERY_TESTDB=true golang:1.14 ./all.bash ci
+ -e GO_DISCOVERY_TESTDB=true golang:1.15 ./all.bash ci
