feat: Allow postgres connections that require ssl mode (#404)

Closes #261

docker-compose.yml

@@ -23,6 +23,11 @@ services:
       - TRUST_PROXY=0
       - DATABASE_URL=postgresql://postgres@postgres/planka
       - SECRET_KEY=notsecretkey
+      # related: https://github.com/knex/knex/issues/2354
+      # As knex does not pass query parameters from the connection string we
+      # have to use environment variables in order to pass the desired values, e.g.
+      # note: this is optional
+      # PGSSLMODE=require
     depends_on:
       - postgres