do not install python deps in the core image

Signed-off-by: Ettore Di Giacinto <[email protected]>

Dockerfile

@@ -24,12 +24,9 @@ RUN apt-get update && \
         cmake \
         curl \
         git \
-        python3-pip \
-        python-is-python3 \
         unzip && \
     apt-get clean && \
-    rm -rf /var/lib/apt/lists/* && \
-    pip install --upgrade pip
+    rm -rf /var/lib/apt/lists/*
 
 # Install Go
 RUN curl -L -s https://go.dev/dl/go${GO_VERSION}.linux-${TARGETARCH}.tar.gz | tar -C /usr/local -xz
@@ -39,9 +36,6 @@ ENV PATH $PATH:/root/go/bin:/usr/local/go/bin
 RUN go install google.golang.org/protobuf/cmd/protoc-gen-go@latest && \
     go install google.golang.org/grpc/cmd/protoc-gen-go-grpc@latest
 
-# Install grpcio-tools (the version in 22.04 is too old)
-RUN pip install --user grpcio-tools
-
 COPY --chmod=644 custom-ca-certs/* /usr/local/share/ca-certificates/
 RUN update-ca-certificates
 
@@ -85,10 +79,16 @@ RUN apt-get update && \
     apt-get install -y --no-install-recommends \
         espeak-ng \
         espeak \
+        python3-pip \
+        python-is-python3 \
         python3-dev \
         python3-venv && \
     apt-get clean && \
-    rm -rf /var/lib/apt/lists/*
+    rm -rf /var/lib/apt/lists/* && \
+    pip install --upgrade pip
+
+# Install grpcio-tools (the version in 22.04 is too old)
+RUN pip install --user grpcio-tools
 
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