fix: force binary-only wheels for heavy deps to speed up Docker build

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Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>

Dockerfile

@@ -3,17 +3,18 @@ FROM python:3.11-slim
 WORKDIR /app
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
-    g++ \
     libgeos-dev \
     libproj-dev \
     proj-data \
     proj-bin \
     && rm -rf /var/lib/apt/lists/*
 
-# Install dependencies first (cached layer)
+# Install dependencies as binary wheels (fast, no compilation)
 COPY pyproject.toml .
 COPY app/__init__.py app/__init__.py
-RUN pip install --no-cache-dir --prefer-binary .
+RUN pip install --no-cache-dir --only-binary :all: \
+    numpy scipy matplotlib cartopy geopandas shapely pyproj rioxarray xarray \
+    && pip install --no-cache-dir .
 
 # Copy application code
 COPY app/ app/