Update for use on render

Author: bprobert97

.streamlit/config.toml

@@ -0,0 +1,4 @@
+[server]
+headless = true
+enableCORS = false
+port = 10000  # Render will set PORT env var

README.md

@@ -20,6 +20,9 @@ _A Horizon Star Plot from Glasgow_
 │
 ├── 📁 .github/workflows/              # GitHub Workflow files
 │   └── main.yml                       # CI configuration for github: Pylint and Mypy
+|
+├── 📁 .streamlit/config/               # Web app configuration files
+│   └── config.toml                     # Configuration for render to use streamlit
 │
 ├── 📁 images/                         # Image assets
 │   └── glasgow_horizon.png           # Image generated by scripts/glasgow_horizon.py

app.py

@@ -19,21 +19,20 @@
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 """
-
 import os
 import pathlib
-import tempfile
 import starplot
 import streamlit as st
 from datetime import datetime, date
 from zoneinfo import ZoneInfo
 from scripts.glasgow_horizon import make_horizon_plot
 from scripts.glasgow_zenith import make_zenith_plot
 
-# Override the library path
-starplot_library_dir = pathlib.Path(tempfile.gettempdir()) / "starplot_library"
-os.makedirs(starplot_library_dir, exist_ok=True)
-starplot.data.library_path = starplot_library_dir
+# Writable folder for Starplot / DuckDB extensions
+starplot_writable = pathlib.Path("starplot_library")
+os.makedirs(starplot_writable, exist_ok=True)
+# redirect internal library
+starplot.data.library_path = starplot_writable
 
 
 st.title("🌌 Glasgow Starplot Viewer")