Update Dockerfile

Dockerfile

@@ -1,24 +1,39 @@
 FROM golang:alpine
 
-RUN apk update && \
-    apk upgrade && \
-    apk add --no-cache --repository=https://dl-cdn.alpinelinux.org/alpine/edge/community \
-    ffmpeg \
-    libheif \
-    libheif-dev \
+RUN apk update && apk upgrade && \
+    apk add --no-cache \
     bash \
     git \
+    curl \
+    tar \
+    xz \
     pkgconfig \
-    build-base
+    build-base \
+    libheif \
+    libheif-dev
 
 WORKDIR /bot
 
-RUN mkdir downloads
+# download and extract FFmpeg 7.1 (GPL shared build)
+RUN curl -L -o ffmpeg.tar.xz https://github.com/BtbN/FFmpeg-Builds/releases/download/latest/ffmpeg-master-latest-linux64-gpl-shared.tar.xz && \
+    tar -xf ffmpeg.tar.xz && \
+    rm ffmpeg.tar.xz && \
+    cp -r ffmpeg-master-latest-linux64-gpl-shared/bin/* /usr/local/bin/ && \
+    cp -r ffmpeg-master-latest-linux64-gpl-shared/lib/* /usr/local/lib/ && \
+    cp -r ffmpeg-master-latest-linux64-gpl-shared/include/* /usr/local/include/ && \
+    cp -r ffmpeg-master-latest-linux64-gpl-shared/lib/pkgconfig/* /usr/local/lib/pkgconfig/ && \
+    ldconfig
+
+ENV CGO_CFLAGS="-I/usr/local/include"
+ENV CGO_LDFLAGS="-L/usr/local/lib"
+ENV PKG_CONFIG_PATH="/usr/local/lib/pkgconfig"
+
+RUN pkg-config --libs libavcodec
 
 COPY . .
 
+RUN mkdir -p downloads
 RUN chmod +x build.sh
-
 RUN ./build.sh
 
-ENTRYPOINT ["./govd"]
+ENTRYPOINT ["./govd"]