fix: use static path for favicon (#48)

Author: smeijer

package.json

@@ -9,7 +9,7 @@
     "start:embed": "parcel src/embed.html --open",
     "build": "run-s clean build:client build:server",
     "build:client": "parcel build src/index.html src/embed.js --out-dir dist/client",
-    "postbuild:client": "mkdir -p dist/client/public && cp _redirects dist/client/_redirects && cp public/android-chrome-512x512.png dist/client/public/icon.png",
+    "postbuild:client": "mkdir -p dist/client/public && cp _redirects dist/client/_redirects && cp public/favicon.ico dist/client/favicon.ico && cp public/android-chrome-512x512.png dist/client/public/icon.png",
     "build:server": "cp -r src/lambda/ dist/server",
     "postbuild:server": "mkdir -p dist/server/server && mv dist/client/index.html dist/server/server/",
     "lint": "eslint 'src/**/*.js' --quiet --fix",