Build spyserver_client earlier

Dockerfile

@@ -39,6 +39,11 @@ RUN git clone https://github.com/steve-m/librtlsdr.git /root/librtlsdr && \
   make install && \
   rm -rf /root/librtlsdr
 
+# Compile spyserver_client from source.
+RUN git clone https://github.com/miweber67/spyserver_client.git /root/spyserver_client && \
+  cd /root/spyserver_client && \
+  make
+
 # Copy in radiosonde_auto_rx.
 COPY . /root/radiosonde_auto_rx
 
@@ -46,11 +51,6 @@ COPY . /root/radiosonde_auto_rx
 WORKDIR /root/radiosonde_auto_rx/auto_rx
 RUN /bin/sh build.sh
 
-# Compile spyserver_client from source.
-RUN git clone https://github.com/miweber67/spyserver_client.git /root/spyserver_client && \
-  cd /root/spyserver_client && \
-  make
-
 # -------------------------
 # The application container
 # -------------------------