This guide might look long, but it's gonna take you less than 5 minutes to go through it.
To create a free MongoDB cluster head over to MongoDB Atlas and create an account (no credit card is required). https://www.mongodb.com/cloud/atlas/register
Once your account is created, you'll be presented with an option to create your first cluster. Select the Free option (or paid if that suits you better).
Afterwards select your cloud provider and region. We recommend to select AWS and the same region where you will deploy your Webiny instance, but this is not a requirement.
Once you are ready, click the create cluster button.
When your cluster is deployed it's time to get your MongoDB server connection string. Under the Atlas menu, make sure you're inside the Clusters submenu. There under your cluster click the connect button.
This will present a screen with several connection options. But before that you'll need to whitelist an IP to allow Lambda to connect to your cluster. Click the Add a different IP address button and then insert
0.0.0.0/0 in the IP Address space and press Add IP Address.
This IP range allows any outside client, given it has the right credentials, to connect to your database. Because Lambda functions are deployed on the "public internet", their IP address changes, so you can't whitelist a specific address, instead you need to allow any IP to connect.
Once you've whitelisted the IP, add a database user. You can add any credentials you want there, just make sure you note the password, you'll need it later.
Cool, at this point you should have completed both steps and have a dialog looking like the one below. Click the choose a connection method button to proceed to the next step.
Now it's time to select your connection method. For your case select the "Connect Your Application" option.
This will present you with a connection string. You want to copy that string and replace
<password> with the password you assigned to your MongoDB user.
At this point you can close this window and paste the connection string into the
.env.json file in your webiny project folder. Just make sure you've replaced the