Update Dockerfile

Dockerfile

@@ -42,12 +42,12 @@ RUN redis-server
 FROM postgres:latest
 
 # Start Postgres
-RUN pg_ctl -D /usr/local/pgsql/data start
+RUN su pg_ctl -D /usr/local/pgsql/data start
 
 # Create user, database, and grant privileges
-RUN psql -U postgres -c "CREATE USER postadmin WITH PASSWORD 'postpass';"
-RUN psql -U postgres -c "CREATE DATABASE siksalaya;"
-RUN psql -U postgres -c "GRANT ALL PRIVILEGES ON DATABASE siksalaya TO postadmin;"
+RUN su psql -U postgres -c "CREATE USER postadmin WITH PASSWORD 'postpass';"
+RUN su psql -U postgres -c "CREATE DATABASE siksalaya;"
+RUN su psql -U postgres -c "GRANT ALL PRIVILEGES ON DATABASE siksalaya TO postadmin;"
 
 ENV DATABASE_URL=postgresql://postadmin:postpass@localhost/siksalaya