deploying serverless from ubuntu with python dependencies hangs, fails, is generally unclear

**Describe the Issue:**

I am trying to deploy a very simple python script with a handful of dependencies via doctl and I just keep running into issue after issue:

- It seems the only way to install dependencies is to include a build script. However it is not clear without a ton of digging that snap installations will not let you build locally
- the deploy when building remotely appears to hang because there is no output whatsoever until the build is complete
- installing just 3 dependencies seems impossible. The build times out (and there's no way to change that timeout) every time
- If I add the --verbose-build flag then I get some stout back, but only so much before I just get `413 Payload Too Large` instead.
- I also got an out of memory error once for the build. It's literally just running pip.
- --verbose and --trace don't change the output at all

**Environment:**
- doctl version:
doctl version 1.120.2-release
Git commit hash: 34e9fbbe
- OS: Ubuntu 24.04 LTS
- Installation method: snap

**Additional Details:**

my requirements.txt:
```
pyiceberg[s3fs]==0.8.1
aiobotocore==2.17.0
polars==1.20.0
```

my build.sh
```shell
#!/bin/bash

set -e

virtualenv --without-pip virtualenv
pip install -r requirements.txt --target virtualenv/lib/python3.11/site-packages
```