multi-stages dockerfile, still big but way better

Dockerfile

@@ -13,37 +13,33 @@ COPY core ./core/
 RUN go build -o gogodiscordo
 
 
-FROM ubuntu:focal
+FROM alpine as alpine_voices
+WORKDIR /tmp
+RUN wget --no-check-certificate https://github.com/numediart/MBROLA-voices/archive/master.zip \
+    && unzip master.zip && rm master.zip
+
+FROM ubuntu:focal as ubuntu1
 
 SHELL ["/bin/bash", "-c"]
 
 RUN set -ex;\
-    apt update
-
-RUN set -ex;\
+    apt update && \
     apt install -y --no-install-recommends \
     mbrola \
     espeak-ng \
-    wget \
-    unzip;
-
-RUN wget --no-check-certificate https://github.com/numediart/MBROLA-voices/archive/master.zip
-RUN unzip master.zip
-RUN mkdir -p /usr/share/mbrola/
-RUN cp -r MBROLA-voices-master/data/* /usr/share/mbrola/
+    ffmpeg \
+    ca-certificates \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/*
 
 COPY --from=builder /src/gogodiscordo /app/
-COPY core/ app/core
+COPY config.yaml /app/
+RUN mkdir -p /usr/share/mbrola/
+COPY --from=alpine_voices /tmp/MBROLA-voices-master/data/fr* /usr/share/mbrola/
 
 VOLUME ["/app"]
 
 RUN useradd -d /app appuser
-RUN apt install -y ca-certificates
-RUN apt install -y --no-install-recommends ffmpeg 
-COPY config.yaml /app/
-
-RUN rm master.zip
-RUN apt clean -y
 
 WORKDIR /app
 CMD ["./gogodiscordo"]