Fix ci job

Author: weiznich

.github/workflows/ci.yml

@@ -68,6 +68,7 @@ jobs:
       - name: Install postgres (MacOS)
         if: runner.os == 'macOS' && matrix.backend == 'postgres'
         run: |
+          /usr/local/opt/postgres/bin/initdb -D /usr/local/var/postgres
           /usr/local/opt/postgres/bin/pg_ctl -D /usr/local/var/postgres start
           sleep 3
           /usr/local/opt/postgres/bin/createuser -s postgres