fix: add libpq-dev dependency for RPostgres compilation

Dockerfile

@@ -18,6 +18,7 @@ RUN apt-get update && apt-get install -y \
     libtiff5-dev \
     libjpeg-dev \
     cmake \
+    libpq-dev \
     && rm -rf /var/lib/apt/lists/*
 
 # Set working directory