good, but totally useless new Dockerfile

Dockerfile.scratch

@@ -0,0 +1,75 @@
+# Initially I wanted to build a slim image using this Dockerfile and static linking.
+# It would use something like this in Cargo.toml:
+#
+# [build-dependencies.clang]
+# version = "2.0.0"
+# default-features = false
+# features = ["static"]
+#
+# [build-dependencies.clang-sys]
+# version = "1.7.0"
+# default-features = false
+# features = ["clang_16_0", "static"]
+#
+# But there are a lot of problems with static linking and clang & clang-sys crates:
+# - https://github.com/KyleMayes/clang-sys/issues/174
+# - https://github.com/KyleMayes/clang-rs/issues/17
+# - https://github.com/KyleMayes/clang-sys/issues/148 (this is the one I *like* the most!)
+#
+# So, no static linking for now, but I don't wanna erase all this gorgeous Dockerfile code, so... I'll let it linger
+# in the repo for now.
+
+# Stage 1: Build the Rust application
+FROM rust:1.78-alpine AS builder
+
+# Set the working directory
+WORKDIR /usr/src/
+
+# Install necessary packages
+RUN apk add --no-cache \
+    ffmpeg-libs \
+    ffmpeg-dev \
+    pkgconf \
+    musl-dev \
+    clang16-static \
+    llvm-dev \
+    zlib-dev \
+    libffi-dev \
+    ncurses-dev \
+    gcc \
+    g++ \
+    git \
+    build-base
+
+# Add target for musl
+RUN rustup target add x86_64-unknown-linux-musl
+
+# Create a new Rust project
+RUN USER=root cargo new atranscoder-rpc
+WORKDIR /usr/src/atranscoder-rpc
+
+# Copy the manifest and lock files
+COPY Cargo.toml Cargo.lock ./
+
+# Set the environment variable for libclang path
+ENV LIBCLANG_PATH=/usr/lib/llvm16/lib
+ENV PKG_CONFIG_PATH=/usr/lib/pkgconfig
+
+# Build dependencies to cache them
+RUN cargo build --release --target x86_64-unknown-linux-musl
+
+# Copy the source code
+COPY src ./src
+
+# Build the project and install the binary
+RUN cargo install --target x86_64-unknown-linux-musl --path . && \
+    mkdir -p /result/{tmp,bin} && \
+    mv /usr/local/cargo/bin/atranscoder-rpc /result/bin
+
+# Stage 2: Create the final minimal image
+FROM scratch
+COPY --from=builder /usr/bin/dumb-init /bin/
+COPY --from=builder /result/bin /bin
+COPY --from=builder /result/tmp /tmp
+EXPOSE 8090
+ENTRYPOINT ["/bin/dumb-init", "--", "/bin/atranscoder-rpc"]