clien: pdf-gen: load logo externally; add prepare step * Change the way how the logo to be placed in the pdf is loaded: It can be configured in the `.env.local´ file, otherwise a placeholder will be loaded from the static assets. The placeholder has not been placed in `assets` because it won't be needed if a real logo has been specified and thus should not compiled in by default. * Add a mechanism to do asynchronous preparations before rendering. This is needed for the completeion of the Image() loading, but it also shows how asynchronous preparational step can be added in principle. * Disable the start button when the current rendering is in progress.

module.exports = {
  moduleFileExtensions: ["js", "jsx", "json", "vue"],
  transform: {
    "^.+\\.vue$": "vue-jest",
    ".+\\.(css|styl|less|sass|scss|png|jpg|ttf|woff|woff2)$":
      "jest-transform-stub",
    "^.+\\.jsx?$": "babel-jest"
  },
  moduleNameMapper: {
    "^@/(.*)$": "<rootDir>/src/$1"
  },
  snapshotSerializers: ["jest-serializer-vue"],
  testMatch: [
    "<rootDir>/(tests/unit/**/*.spec.(js|jsx|ts|tsx)|**/__tests__/*.(js|jsx|ts|tsx))"
  ]
};