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Setup

MongoDB, a NoSQL database, is known for high performance and scalability. It’s ideal for handling large data volumes in the Evolution API. Set the MongoDB environment variables in the .env for Docker or the dev-env.yml for NPM file as follows:
.env or dev-env.yml
# Set to true to enable MongoDB.
DATABASE_ENABLED=true
# Your MongoDB connection string.
DATABASE_CONNECTION_URI=mongodb://user:password@database_URL/?authSource=admin&readPreference=primary&ssl=false&directConnection=true
# Prefix for your database name.
DATABASE_CONNECTION_DB_PREFIX_NAME=evo
# Save WhatsApp connection credentials on Mongo
DATABASE_SAVE_DATA_INSTANCE=false 
# Save new messages on Mongo
DATABASE_SAVE_DATA_NEW_MESSAGE=false 
# Save message updates on Mongo
DATABASE_SAVE_MESSAGE_UPDATE=false
# Save imported contacts and new ones
DATABASE_SAVE_DATA_CONTACTS=false 
# Save imported chats and new ones
DATABASE_SAVE_DATA_CHATS=false

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Migrate your data in NPM or NVM

Stop the PM2 execution: Flush and Stop: Clears all logs from PM2, useful for troubleshooting after the update and temporarily stops the Evolution API to safely apply updates. 
# Clear all PM2 logs
pm2 flush

# Stop the current Evolution API process
pm2 stop ApiEvolution
Evolution API directory: access your directory installation with the following command: 
cd evolution-api
Migrate command: Run the migration command in the installation directory: 
npx evolution-manager api migrate-to-mongo
Follow the script steps and migrate specific WhatsApp instances or all your instances.