feat: upgrade ffmpeg in docker image

Dockerfile

@@ -18,8 +18,7 @@ RUN apk add -U --no-cache build-base git
 RUN go get -u github.com/go-bindata/go-bindata/...
 
 # Download and unpack static ffmpeg
-ARG FFMPEG_VERSION=4.1.4
-ARG FFMPEG_URL=https://www.johnvansickle.com/ffmpeg/old-releases/ffmpeg-${FFMPEG_VERSION}-amd64-static.tar.xz
+ARG FFMPEG_URL=https://johnvansickle.com/ffmpeg/releases/ffmpeg-release-amd64-static.tar.xz
 RUN wget -O /tmp/ffmpeg.tar.xz ${FFMPEG_URL}
 RUN cd /tmp && tar xJf ffmpeg.tar.xz && rm ffmpeg.tar.xz
 
@@ -41,17 +40,23 @@ RUN GIT_SHA=$(git rev-parse --short HEAD) && \
 
 #####################################################
 ### Build Final Image
-FROM alpine
+FROM alpine as release
+MAINTAINER  Deluan Quintao <navidrome@deluan.com>
+
 COPY --from=gobuilder /src/navidrome /app/
 COPY --from=gobuilder /tmp/ffmpeg*/ffmpeg /usr/bin/
 
+# Check if ffmpeg runs properly
+RUN ffmpeg -buildconf
+
 VOLUME ["/data", "/music"]
 ENV ND_MUSICFOLDER /music
 ENV ND_DATAFOLDER /data
 ENV ND_SCANINTERVAL 1m
 ENV ND_LOGLEVEL info
 ENV ND_PORT 4533
-EXPOSE 4533
 
+EXPOSE 4533
 WORKDIR /app
-CMD "/app/navidrome"
+
+ENTRYPOINT "/app/navidrome"