Don't use inferred DB urls as prisma does not handle that

Author: krokosik

.env.example

@@ -10,7 +10,7 @@ POSTGRES_USER="postgres"
 POSTGRES_PASSWORD="strong-password"
 POSTGRES_DB="splitpro"
 POSTGRES_PORT=5432
-DATABASE_URL="postgresql://${POSTGRES_USER}:${POSTGRES_PASSWORD}@${POSTGRES_CONTAINER_NAME}:${POSTGRES_PORT}/${POSTGRES_DB}"
+DATABASE_URL="postgresql://postgres:strong-password@localhost:5432/splitpro"
 
 # Next Auth
 # You should generate a new secret on the command line with: