switching default in template.env back to localhost:8080

[surchs]

to make first test deploy quick

Note that the docs will also need to be updated

TODO

• change default to localhost:8080
• add in the getting started docs that changing the value is optional for local trial deployment but required for prod deployment
• add a big red warning box to restate the same in the getting started section (repetition of the above, implementer decides)
• in the "configure a node" section, have a very prominent explanation on how to change the NB_API_QUERY_URL for common prod deployment

[github-actions]

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