Restructure public config and deployment

config.example/service.env.example

@@ -0,0 +1,28 @@
+# Copy or edit this file on the target host at:
+#   <install-dir>/config/service.env
+
+HA_DECONZ_BRIDGE_MQTT_HOST=homeassistant
+HA_DECONZ_BRIDGE_MQTT_PORT=1883
+HA_DECONZ_BRIDGE_MQTT_USER=
+HA_DECONZ_BRIDGE_MQTT_PASSWORD=
+
+HA_DECONZ_BRIDGE_DECONZ_HOST=localhost
+HA_DECONZ_BRIDGE_DECONZ_HTTP_PORT=80
+HA_DECONZ_BRIDGE_DECONZ_WS_PORT=443
+HA_DECONZ_BRIDGE_DECONZ_API_KEY=
+
+# Lower values make nearby color/CT requests share solver cache entries.
+# This improves repeated nearby solves, but can create visible color dead zones.
+HA_DECONZ_BRIDGE_TARGET_CACHE_SCALE=10000
+
+# CT-only uv slack for preferring CT-labeled emitters over exact RGB emulation.
+HA_DECONZ_BRIDGE_APPROXIMATE_CHROMA_BAND=0.025
+
+# Run one representative solver request per HA mode in the background so
+# Numba-backed paths are compiled without blocking MQTT or debugger startup.
+HA_DECONZ_BRIDGE_WARMUP_ON_STARTUP=true
+
+# Numeric backend for color solves. Keep "scipy" unless optional speed
+# dependencies were installed, for example with pip install ".[speed]".
+# Allowed values: scipy, numba, auto.
+HA_DECONZ_BRIDGE_NUMERIC_BACKEND=scipy