Overview
I had the opportunity to run Strapi on Amazon Lightsail, so here are my notes. I referenced the following article:
https://zenn.dev/holykzm/articles/1e54cc25207657
Instance
Select Node.js.

Choose an instance with at least 1GB of memory. If you build on Lightsail, an out-of-memory error will occur with less.
SSL and Custom Domain
Please refer to the following:
https://zenn.dev/nakamura196/articles/5772d6c918508a#独自ドメインの付与
Assign a Static IP, configure a custom domain in Route 53, and run the following:
sudo /opt/bitnami/bncert-tool
ProxyPass Configuration
(There may be a more appropriate location, but) add the following to:
/opt/bitnami/apache2/conf/httpd.conf
# Add the following at the end
ProxyPass / http://localhost:1337/
ProxyPassReverse / http://localhost:1337/
Restart Apache:
sudo /opt/bitnami/ctlscript.sh restart apache
Installing Strapi
cd /opt/bitnami/apache2/htdocs/
npx create-strapi-app@latest backend --quickstart
The application will start, so stop it temporarily with Ctrl+C.
pm2
Installing pm2
sudo npm install pm2 -g
Creating server.js
cd /opt/bitnami/apache2/htdocs/backend
vi server.js
/opt/bitnami/apache2/htdocs/backend/server.js
const strapi = require('@strapi/strapi');
strapi(/* {...} */).start();
Build
cd /opt/bitnami/apache2/htdocs/backend
NODE_ENV=production npm run build
Starting the Server
NODE_ENV=production pm2 start server.js --name strapi
With this, Strapi was successfully started as shown below.

Other Notes
- Stopping the service
pm2 stop strapi
- Editing content types
You need to start in development mode, so run the following:
npm run develop
After editing is complete, run the build and pm2 startup again.
cd /opt/bitnami/apache2/htdocs/backend
NODE_ENV=production npm run build
NODE_ENV=production pm2 start server.js --name strapi
Summary
In this case, I switched between development and production modes on Lightsail. However, as described in the following article, there are also methods using GitHub Actions, which I would like to try in the future.
https://datasciencedude.com/how-to-deploy-strapi-to-aws-lightsail-with-github-actions