HEAT-230 hooking up prettier, eslint and typechecking (#5)

Also starting to support multiple environments

.env.example

@@ -0,0 +1,8 @@
+DEV_APPINSIGHTS_ID=some-app-id
+DEV_APPINSIGHTS_KEY=some-app-key
+
+PREPROD_APPINSIGHTS_ID=some-app-id
+PREPROD_APPINSIGHTS_KEY=some-app-key
+
+PROD_APPINSIGHTS_ID=some-app-id
+PROD_APPINSIGHTS_KEY=some-app-key

.eslintignore

@@ -0,0 +1,6 @@
+node_modules
+public
+assets
+cypress.json
+reporter-config.json
+dist/

.eslintrc.json

@@ -0,0 +1,104 @@
+{
+    "env": {
+      "browser": true,
+      "node": true,
+      "jest": true
+    },
+
+    "plugins": ["import", "no-only-tests"],
+
+    "settings": {
+      "import/parsers": {
+        "@typescript-eslint/parser": [".ts", ".tsx"]
+      },
+      "import/resolver": {
+        "typescript": {
+          "alwaysTryTypes": true
+        },
+        "node": {
+          "extensions": [".js", ".jsx", ".ts", ".tsx", ".json"]
+        }
+      }
+    },
+
+    "overrides": [
+      {
+        "plugins": ["@typescript-eslint"],
+        "parser": "@typescript-eslint/parser",
+        "files": ["**/*.ts"],
+        "excludedFiles": "*.js",
+        "extends": [
+          "plugin:@typescript-eslint/eslint-recommended",
+          "plugin:@typescript-eslint/recommended",
+          "plugin:prettier/recommended"
+        ],
+        "rules": {
+          "no-shadow": "off",
+          "@typescript-eslint/no-shadow": ["error"],
+          "@typescript-eslint/no-use-before-define": 0,
+          "class-methods-use-this": 0,
+          "no-useless-constructor": 0,
+          "@typescript-eslint/no-unused-vars": [
+            1,
+            {
+              "argsIgnorePattern": "res|next|^err|_",
+              "ignoreRestSiblings": true
+            }
+          ],
+          "@typescript-eslint/semi": 0,
+          "import/no-unresolved": "error",
+          "prettier/prettier": [
+            "error",
+            {
+              "trailingComma": "all",
+              "singleQuote": true,
+              "printWidth": 150,
+              "semi": false
+            }
+          ]
+        }
+      }
+    ],
+
+    "extends": ["airbnb-base", "plugin:prettier/recommended"],
+
+    "rules": {
+      "no-unused-vars": [
+        1,
+        {
+          "argsIgnorePattern": "res|next|^err|_",
+          "ignoreRestSiblings": true
+        }
+      ],
+      "no-use-before-define": 0,
+      "semi": 0,
+      "import/no-unresolved": "error",
+      "import/extensions": [
+        "error",
+        "ignorePackages",
+        {
+          "js": "never",
+          "mjs": "never",
+          "jsx": "never",
+          "ts": "never",
+          "tsx": "never"
+        }
+      ],
+      "comma-dangle": ["error", "always-multiline"],
+      "import/no-extraneous-dependencies": [
+        "error",
+        { "devDependencies": ["**/*.test.js", "**/*.test.ts", "**/testutils/**", "cypress.config.ts"] }
+      ],
+      "no-only-tests/no-only-tests": "error",
+      "prettier/prettier": [
+        "error",
+        {
+          "trailingComma": "all",
+          "singleQuote": true,
+          "printWidth": 150,
+          "semi": false
+        }
+      ],
+      "no-empty-function": ["error", { "allow": ["constructors", "arrowFunctions"] }]
+    }
+  }

.gitignore

@@ -2,3 +2,5 @@ node_modules/
 dependencies.csv
 components.json
 .env
+dist
+.eslintcache

.nvmrc

@@ -0,0 +1 @@
+20

.prettierrc

@@ -0,0 +1,15 @@
+{
+  "trailingComma": "all",
+  "singleQuote": true,
+  "printWidth": 150,
+  "semi": false,
+  "arrowParens": "avoid",
+  "overrides": [
+    {
+      "files": "*.njk",
+      "options": {
+        "parser": "jinja-template"
+      }
+    }
+  ]
+}

jest.config.js

@@ -1,7 +1,7 @@
 /** @type {import('ts-jest/dist/types').InitialOptionsTsJest} */
 export default {
-    preset: 'ts-jest',
-    testEnvironment: 'node',
-    testMatch: ['<rootDir>/src*/*.test.ts'],
-    testPathIgnorePatterns: ['/node_modules/', 'templates'],
-};
+  preset: 'ts-jest',
+  testEnvironment: 'node',
+  testMatch: ['<rootDir>/src*/*.test.ts'],
+  testPathIgnorePatterns: ['/node_modules/', 'templates'],
+}