[istex] bump up istex tag

Also, remove caddy from docker-compose.
4 jobs for dev-456-istex-tls-fix in 21 minutes and 59 seconds (queued for 3 minutes and 55 seconds)
Status Job ID Name Coverage
  Cabal
failed #17696
cabal

00:21:59

 
  Stack
skipped #17697
stack
 
  Bench
skipped #17698
allowed to fail manual
bench
 
  Test
skipped #17699
test
 
Name Stage Failure
failed
cabal Cabal
ERROR! hash mismatch between expected cabal.project and the one computed by cabal2stack.
Please update the hashes inside the './bin/update-project-dependencies' file.
+ actual_cabal_project_freeze_hash=cd52143d3a9d285360b59c6371d3e258552c1bc115bd612024db3de1f7593ff7
+ [[ caf2eedcd55ec29e161a2c63cfd68243a0d7f71a13e5ffcfa4d9d9f2937f92c8 != 37352ca36ca5e69d9945da11439be4c3909297b338242855fa588dffdf1ba02b ]]
+ echo -e '\e[31mERROR! hash mismatch between expected cabal.project and the one computed by cabal2stack.\e[0m'
+ echo -e '\e[33mPlease update the hashes inside the '\''./bin/update-project-dependencies'\'' file.\e[0m'
+ exit 1
Cleaning up project directory and file based variables
ERROR: Job failed: exit code 1