Provide two cases: one to install nginx httpg, one for nginx stable

Try to create two rpm, one for ngx with httpg patch, one for voms module

gitlab-ci and readme need to be updated

Merge branch '30-bug-in-devcontainer-patch-file-not-found-in-openresty-voms-installation' into 'master'

Resolve "Bug in devcontainer: patch file not found in openresty-voms installation"

Closes #30

See merge request storm2/ngx_http_voms_module!22

Specify the correct location of the nginx-httpg_no_delegation.patch file in the script for installing openresty-voms in the devcontainer

Merge branch '28-using-an-embedded-variable-in-a-subrequest-causes-a-segmentation-fault' into 'master'

Resolve "Using an embedded variable in a subrequest causes a segmentation fault"

Closes #28

See merge request storm2/ngx_http_voms_module!20

Remove user ownership and add executable permission to build-install-openresty-voms script.