docker multi stage build.

Author: m1k1o

Dockerfile

@@ -1,25 +1,30 @@
-FROM golang:1.17-bullseye
-
-WORKDIR /app
-
 #
-# install dependencies
-ENV DEBIAN_FRONTEND=noninteractive
-RUN set -eux; apt update; \
-    apt install -y --no-install-recommends ffmpeg; \
-    #
-    # clean up
-    apt clean -y; \
-    rm -rf /var/lib/apt/lists/* /var/cache/apt/*
+# STAGE 1: build executable binary
+#
+FROM golang:1.17-alpine as builder
+WORKDIR /app
 
 #
 # build server
 COPY . .
-
 RUN go get -v -t -d .; \
-    go build -o bin/go-transcode
+    CGO_ENABLED=0 go build -o go-transcode
+
+#
+# STAGE 2: build a small image
+#
+FROM alpine
+WORKDIR /app
+
+#
+# install dependencies
+RUN apk add --no-cache bash ffmpeg
+
+COPY --from=builder /app/go-transcode go-transcode
+COPY profiles profiles
 
+EXPOSE 8080
 ENV TRANSCODE_BIND=:8080
 
-ENTRYPOINT [ "bin/go-transcode" ]
+ENTRYPOINT [ "./go-transcode" ]
 CMD [ "serve" ]

Dockerfile.nvidia

@@ -1,9 +1,15 @@
 ARG GO_TRANSCODE_IMAGE=go-transcode:latest
 ARG BASE_IMAGE=willprice/nvidia-ffmpeg
 
+#
+# STAGE 1: build executable binary
+#
 FROM $GO_TRANSCODE_IMAGE as build
-FROM $BASE_IMAGE as base
 
+#
+# STAGE 2: build a small image
+#
+FROM $BASE_IMAGE as base
 WORKDIR /app
 
 ARG USERNAME=user
@@ -13,13 +19,14 @@ ARG USER_GID=$USER_UID
 RUN groupadd --gid $USER_GID $USERNAME; \
     useradd --uid $USER_UID --gid $USERNAME --shell /bin/bash --create-home $USERNAME;
 
-COPY --from=build /app/bin bin
+COPY --from=build /app/go-transcode go-transcode
 COPY profiles profiles
-COPY data data
 
 ENV USER=$USERNAME
 ENV NVIDIA_DRIVER_CAPABILITIES=compute,utility,video
 
+EXPOSE 8080
 ENV TRANSCODE_BIND=:8080
-ENTRYPOINT [ "bin/transcode" ]
+
+ENTRYPOINT [ "./go-transcode" ]
 CMD [ "serve" ]