Start installation guide in the docs

docs/install.md

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+## Python developer edition
+
+Setup [Poetry](https://python-poetry.org/docs/master/#installing-with-the-official-installer).
+
+```bash
+curl -sSL https://install.python-poetry.org | python3 -
+```
+
+Clone the repository.
+
+```bash
+git clone https://git.sr.ht/~tsileo/microblog.pub testing.microblog.pub
+```
+
+Install deps.
+
+```bash
+poetry install
+```
+
+Setup config.
+
+```bash
+poetry run inv configuration-wizard
+```
+
+Grab your virtualenv path.
+
+```bash
+poetry env info
+```
+
+Run the two processes with supervisord.
+
+```bash
+VENV_DIR=/home/ubuntu/.cache/pypoetry/virtualenvs/microblogpub-chx-y1oE-py3.10 poetry run supervisord -c misc/supervisord.conf -n
+```
+
+You will also want to setup a reverse proxy like Nginx, see [uvicorn documentation](https://www.uvicorn.org/deployment/#running-behind-nginx):
+
+```nginx
+server {
+    client_max_body_size 4G;
+
+    location / {
+      proxy_set_header Host $http_host;
+      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+      proxy_set_header X-Forwarded-Proto $scheme;
+      proxy_set_header Upgrade $http_upgrade;
+      proxy_set_header Connection $connection_upgrade;
+      proxy_redirect off;
+      proxy_buffering off;
+      proxy_pass http://localhost:8000;
+    }
+
+    # [...]
+}
+
+```