In order to make better decisions mind tradeoffs. For instance for Docker here is my list.

Advantages

• mobility. Your app become more mobile, easy to deploy.
• better version control. You can always revert in no time
• single approach for app deployment
• easy to scale
• storage for source code (dockerhub, docker cloud)

Disadvantages

• longer app deploy time
• longer app compile time
• more storage used
• less responsive code in development
• change every process from deployment to backup
• easier to shoot self in foot with wrong data storage design
• new abstraction layer = more knowledge to acquire
• it’s harder to recover data in case of loss
• testing process will include one more step