* add custom headers to API resource

* refactoring

* page title

* chart

* gas prices snippet

* GasPrice component

* add ENV for gas units

* dark theme and other tweaks

* tests

* add base and priority fee

* [skip ci] small fiat values

* change behavior of the variable

* update tooltip layout

* refactor gas info tooltip

* refactor GasPrice component

* fix logic and deploy demo for eth mainnet

* tests

* remove link from anchor

* [skip ci] rollback ENVs for demo

* review fixes

* fix tests