docs: Install postgres using apt/yum
docs: Install postgres using apt/yum

Recent distros come with Postgres 10 or newer

mic4ael/indico,ThiefMaster/indico,indico/indico,mic4ael/indico,mic4ael/indico,DirkHoffmann/indico,ThiefMaster/indico,indico/indico,indico/indico,mic4ael/indico,DirkHoffmann/indico,DirkHoffmann/indico,pferreir/indico,DirkHoffmann/indico,pferreir/indico,ThiefMaster/indico,pferreir/indico,indico/indico,pferreir/indico,ThiefMaster/indico