In the VPC interface, click Route Tables on the sidebar, then click Create Route Table
In the Create route table interface:
public-route-table
After successfully creating the route table, click Edit routes
In the Edit routes interface, choose Add route
Then add a route with Destination is 0.0.0.0/0
and Target is workshop-01-igw then click Save changes
After successfully creating, switch to the Subnet associations tab and click Edit subnet associations
Choose 2 public subnets we have created then click Save associations
Perform the same steps to create private-route-table-01 for private subnet 1
Add a route with Destination is 0.0.0.0/0
and Target is nat-gw-01 then click Save changes
Choose private subnet 1 then click Save associations
0.0.0.0/0
and Target is igw (to communicate with db instance from outside the vpc)