add eslint

.editorconfig

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+root = true
+
+[*]
+end_of_line = lf
+charset = utf-8
+indent_size = 2
+indent_style = space
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.md]
+trim_trailing_whitespace = false

.prettierrc

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+{
+  "arrowParens": "avoid",
+  "bracketSpacing": true,
+  "cursorOffset": -1,
+  "endOfLine": "auto",
+  "htmlWhitespaceSensitivity": "css",
+  "insertPragma": false,
+  "jsxBracketSameLine": false,
+  "jsxSingleQuote": false,
+  "pluginSearchDirs": [],
+  "plugins": [],
+  "printWidth": 80,
+  "proseWrap": "preserve",
+  "quoteProps": "as-needed",
+  "rangeStart": 0,
+  "requirePragma": false,
+  "semi": true,
+  "singleQuote": false,
+  "tabWidth": 2,
+  "trailingComma": "none",
+  "useTabs": false,
+  "vueIndentScriptAndStyle": false
+}

.vscode/extensions.json

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+{
+  // See http://go.microsoft.com/fwlink/?LinkId=827846 to learn about workspace recommendations.
+  // Extension identifier format: ${publisher}.${name}. Example: vscode.csharp
+
+  // List of extensions which should be recommended for users of this workspace.
+  "recommendations": ["dbaeumer.vscode-eslint"],
+  // List of extensions recommended by VS Code that should not be recommended for users of this workspace.
+  "unwantedRecommendations": [
+    "esbenp.prettier-vscode",
+    "ms-vscode.vscode-typescript-tslint-plugin"
+  ]
+}

.vscode/launch.json

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+{
+  // Use IntelliSense to learn about possible attributes.
+  // Hover to view descriptions of existing attributes.
+  // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "type": "node",
+      "request": "launch",
+      "name": "run",
+      "program": "${workspaceFolder}/bin/run",
+      "args": [
+        "run",
+        "https://gitlab.com/gitlab-org/gitlab"
+      ],
+      "console": "integratedTerminal",
+      "internalConsoleOptions": "neverOpen",
+      "disableOptimisticBPs": true,
+    },
+    {
+      "type": "node",
+      "request": "launch",
+      "name": "Jest All",
+      "program": "${workspaceFolder}/node_modules/.bin/jest",
+      "args": [
+        "--runInBand"
+      ],
+      "console": "integratedTerminal",
+      "internalConsoleOptions": "neverOpen",
+      "disableOptimisticBPs": true,
+      "windows": {
+        "program": "${workspaceFolder}/node_modules/jest/bin/jest",
+      }
+    },
+    {
+      "type": "node",
+      "request": "launch",
+      "name": "Jest Current File",
+      "program": "${workspaceFolder}/node_modules/.bin/jest",
+      "args": [
+        "${fileBasenameNoExtension}",
+        "--config",
+        "jest.config.js"
+      ],
+      "console": "integratedTerminal",
+      "internalConsoleOptions": "neverOpen",
+      "disableOptimisticBPs": true,
+      "windows": {
+        "program": "${workspaceFolder}/node_modules/jest/bin/jest",
+      }
+    }
+  ]
+}

.vscode/scanner.code-snippets

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+{
+	// Place your scanner workspace snippets here. Each snippet is defined under a snippet name and has a scope, prefix, body and 
+	// description. Add comma separated ids of the languages where the snippet is applicable in the scope field. If scope 
+	// is left empty or omitted, the snippet gets applied to all languages. The prefix is what is 
+	// used to trigger the snippet and the body will be expanded and inserted. Possible variables are: 
+	// $1, $2 for tab stops, $0 for the final cursor position, and ${1:label}, ${2:another} for placeholders. 
+	// Placeholders with the same ids are connected.
+	// Example:
+	// "Print to console": {
+	// 	"scope": "javascript,typescript",
+	// 	"prefix": "log",
+	// 	"body": [
+	// 		"console.log('$1');",
+	// 		"$2"
+	// 	],
+	// 	"description": "Log output to console"
+  // }
+  "Insert empty JSDoc comment": {
+    "prefix": "dc",
+    "body": ["/**", " * $1", " */"],
+    "description": "Insert empty JSDoc comment"
+  },
+}

.vscode/settings.json

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+{
+  "editor.formatOnSave": false,
+  "[javascript]": {
+    "editor.formatOnSave": false,
+  },
+  "[javascriptreact]": {
+    "editor.formatOnSave": false,
+  },
+  "[typescript]": {
+    "editor.formatOnSave": false,
+  },
+  "[typescriptreact]": {
+    "editor.formatOnSave": false,
+  },
+  "eslint.enable": true,
+  "eslint.alwaysShowStatus": true,
+  "eslint.packageManager": "yarn",
+  "typescript.tsdk": "node_modules/typescript/lib",
+  "typescript.preferences.importModuleSpecifier": "relative",
+  "editor.codeActionsOnSave": {
+    "source.fixAll.eslint": true
+  }
+}