Since the Procfile.windows file is meant to be used on Windows platform, the environment variable must be referenced using Windows style (i.e. %ENV_VAR_NAME%)  and not using *nix style (i.e. $ENV_VAR_NAME).
Since the Procfile.windows file is meant to be used on Windows platform, the environment variable must be referenced using Windows style (i.e. %ENV_VAR_NAME%)  and not using *nix style (i.e. $ENV_VAR_NAME).

satrapu/iquest-keyboards-and-mice-brasov-2016