Onboarding instructions do not work

[shreevatsa]

I do not know how long this has been broken, but https://github.com/ambuda-org/ambuda#quickstart says:

$ git clone https://github.com/ambuda-org/ambuda.git
$ cd ambuda
$ make devserver

Trying it out:

$ mkdir ambuda-v10
$ cd ambuda-v10 
$ git clone https://github.com/ambuda-org/ambuda.git
Cloning into 'ambuda'...
remote: Enumerating objects: 6152, done.
remote: Counting objects: 100% (661/661), done.
remote: Compressing objects: 100% (316/316), done.
remote: Total 6152 (delta 397), reused 554 (delta 339), pack-reused 5491
Receiving objects: 100% (6152/6152), 1.93 MiB | 9.05 MiB/s, done.
Resolving deltas: 100% (4059/4059), done.
$ cd ambuda
$ make devserver
Error! Python venv not activated. Activate venv to proceed. Run: 
  > source env/bin/activate

exit 1
make: *** [py-venv-check] Error 1
$ source env/bin/activate
source: no such file or directory: env/bin/activate
$ 

It feels like the setup instructions have been broken the majority of times I've tried. Maybe it needs a test or something.

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(Edit / note to self: Unblocked myself using shell history: npx concurrently "flask run" "make css-dev" "make js-dev" "make js-dev-proofer" worked in the local directory I had been using a few months ago, though it will probably not work with a new repo clone.)