README instructions don't work

[achingbrain]

The build & run instructions error out:

$ docker build . --tag amino
// docker noise
$ docker run -v $(pwd)/bootstrapper-config.json:/config.json -it amino --config /config.json
Attempting to use config file from /config.json
Error: EISDIR: illegal operation on a directory, read
    at readFileSync (node:fs:448:20)
    at readConfig (file:///app/dist/src/utils/load-config.js:3:26)
    at autoConfig (file:///app/dist/src/utils/auto-config.js:30:16)
    at file:///app/dist/src/index.js:95:22
    at ModuleJob.run (node:internal/modules/esm/module_job:234:25)
    at async ModuleLoader.import (node:internal/modules/esm/loader:473:24)
    at async asyncRunEntryPointWithESMLoader (node:internal/modules/run_main:123:5) {
  errno: -21,
  code: 'EISDIR',
  syscall: 'read'
}

May be related to #151

cc @SgtPooki

[SgtPooki]

PR is out @achingbrain