docs: Fix syntax error

(cherry picked from commit cf5660e8e5b4be902d8697ea0f4843356efb9359)
docs: Add Discuss link to readme

(cherry picked from commit 61e724eb0e314e5ec5d8e39f2319a1d8a7e193c1)
docs: Rewrite 'getting help' section

(cherry picked from commit 13c92dae65ac86cea64e21009a02499801a7e40a)
Merge branch 'release/v0.19.x' into develop