chore: Refactor server tests to use jest

api-server/jest.config.js

@@ -0,0 +1,22 @@
+module.exports = {
+  moduleNameMapper: {
+    '\\.(jpg|jpeg|png|svg|woff|woff2)$': '<rootDir>/src/__mocks__/fileMock.js',
+    // Plain CSS - match css files that don't end with
+    // '.module.css' https://regex101.com/r/VzwrKH/4
+    '^(?!.*\\.module\\.css$).*\\.css$': '<rootDir>/src/__mocks__/styleMock.js',
+    // CSS Modules - match files that end with 'module.css'
+    '\\.module\\.css$': 'identity-obj-proxy',
+    analytics: '<rootDir>/src/__mocks__/analyticsMock.js'
+  },
+  testPathIgnorePatterns: ['/node_modules/', '<rootDir>/.cache/'],
+  globals: {
+    __PATH_PREFIX__: ''
+  },
+  verbose: true,
+  transform: {
+    '^.+\\.js$': 'babel-jest'
+  },
+  transformIgnorePatterns: [
+    'node_modules/(?!(gatsby)/)'
+  ]
+};