Docs: Add step for upgrading pip

[mradamcox]

Problem description

I am installing a local build for development as described here, https://developmentseed.org/titiler/#installation, and ran into an issue with the fact that there is no setup.py in the app, only pyproject.toml. Turns out, this is just a problem with pip <21.3 (I had 20 by default in my virtual environment). Upgrading allowed me to make an editable install without any trouble.

Adding

python -m pip install --upgrade pip

as a first step in those commands may be helpful for others in the future.

Environment Information

Ubuntu 20.04, Python 3.8.10 (using venv for virtual environment)

[vincentsarago]

pip install -U pip is the first line in https://developmentseed.org/titiler/#installation

$ pip install -U pip
$ pip install uvicorn
$ pip install titiler.{package}

🤷‍♂️

[vincentsarago]

I added a bit more doc with https://github.com/developmentseed/titiler/commit/9dccc4d9c53dccc592298429f9454ded6113c2e0

sorry if you lost time on this issue.

[mradamcox]

Oh, well no I was just looking at the second section and now I feel silly :facepalm: . Sorry for missing that! No worries.

[vincentsarago]

no worry, I didn't see that you were talking about the local build section. I added it there too.

it took me some times but now I'm doing pip install -U pip every two weeks or so 😅