build: add ESLint to script/lint and containerize linting (closes #152)

src/popup/views/approval.js

@@ -9,7 +9,7 @@ const {
     attachCopyHandlers,
     onViewLeave,
 } = require("./helpers");
-const { state, saveState, currentNetwork } = require("../../shared/state");
+const { state, saveState } = require("../../shared/state");
 const { networkByChainId } = require("../../shared/networks");
 const {
     formatEther,
@@ -543,7 +543,7 @@ function clearSignPassword() {
     hideError("approve-sign-error");
 }
 
-function init(ctx) {
+function init(_ctx) {
     onViewLeave("approve-tx", clearTxPassword);
     onViewLeave("approve-sign", clearSignPassword);