doc: add readme license note (#21)

Add a note on license:

> The docker image is only valid for a short period

feature : add chaos testing example (#20)

- [x] add chaos testing example using toxiproxy 
- [x] create prometheus dashboard 
- [x] create README to explain the setup

deps: replace centos by rockylinux (#19)

closes #17 

- [x] use rockylinux instead of centos since RHEL EOL issues and a true
RHEL drop-in solution.
- [x] add missing libnsl dependency for sybase

update basic example

feat: disable non sa logins during recovery (#16)

Sybase server port is opened while it is not completely setup (with
multiple devices setup).

Client using the image should not use SA account but instead use a non
SA account so that the login will work when sybase becomes ready.

- [x] set "enable logins during recovery" cf to 0
- [x] fix log by replacing "sybase started" to "docker-sybase started"
- [x] add basic docker-compose example
- [x] clean README

chore/update publish github action (#15)

- [x] update publish github action
- [x] fix dockerhub semver tag publish

add licence section in readme (#14)

conf: optimize default conf (#13)

According to internal tests, the configuration should be changed as
bellow:

srvbuild.master_device_size: 150
srvbuild.master_database_size: 100
srvbuild.tempdb_device_size: 250
srvbuild.tempdb_database_size: 250

max memory = 500000
procedure cache size = 100000

feat: add healthcheck initialized check (#12)

Add a new check in the healthcheck to be sure that the sybase server is
ready

feat/metrics example (#11) + fix new sybase package structure issue

Add an example to support metrics/timers in stored procedure / sql in
sybase

- use sp_sendmsg to send udp pakets
- create a script sample to find the best trafeoffs and alternative to a
common stopwatch
- integrate metrics in prometheus with statsd-exporter adapter

# Stopwatch tradeoff
Measuring delay with 2 dates is not recommended but to measure high
latencies (> 1s since the precision is up to 1/300 second according to
sybase documentation) without true stopwatch/timestamp, it is ok.