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Text Elements

Application (Code + Environment)

Written and provided by you (= the developer)

Added to image and container in build phase

“Fixed”: Can’t be changed once image in built

Read-only, hence stored in Images

Temporary App Data (e.g. entered user input)

Fetched / Produced in running container

Stored in memory or temporary files

Dynamic and changing, but cleared regularly

Read + write, temporary, hence stored in Containers

Permanent App Data (e.g. user accounts)

Fetched / Produced in running container

Stored in files or a database

Must not be lost if container stops / restarts

Read + write, permanent, stored with Containers & Volumes