To run:
docker pull unleashorg/unleash-proxy
docker run \
-e UNLEASH_PROXY_SECRETS=some-secret \
-e UNLEASH_URL=https://app.unleash-hosted.com/demo/api/ \
-e UNLEASH_API_TOKEN=56907a2fa53c1d16101d509a10b78e36190b0f918d9f122d \
-p 3000:3000 \
unleashorg/unleash-proxy