Implement Docker image based on Alpine

.dockerignore

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+target/
+Dockerfile
+.dockerignore

.github/workflows/docker.yaml

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+# A single-shot build-n-pack on Alpine Linux
+name: Publish Docker image
+on: [push]
+
+jobs:
+  push_to_registry:
+    name: Build Docker image
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out the repo
+        uses: actions/checkout@v2
+      - name: Push to Docker Hub
+        uses: docker/build-push-action@v1
+        with:
+          username: thirtythreeforty
+          password: ${{ secrets.DOCKER_TOKEN }}
+          registry: docker.io
+          repository: thirtythreeforty/neolink
+          tag_with_ref: true

Dockerfile

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+# Neolink Docker image build scripts
+# Copyright (c) 2020 George Hilliard
+# SPDX-License-Identifier: AGPL-3.0-only
+
+FROM docker.io/rust:1-alpine AS build
+MAINTAINER [email protected]
+
+RUN apk add --no-cache -X http://dl-cdn.alpinelinux.org/alpine/edge/testing \
+  gst-rtsp-server-dev
+RUN apk add --no-cache musl-dev gcc
+
+# Use static linking to work around https://github.com/rust-lang/rust/pull/58575
+ENV RUSTFLAGS='-C target-feature=-crt-static'
+
+# Compile dependencies before main app to save rebuild time
+# https://github.com/errmac-v/cargo-build-dependencies
+RUN cargo install cargo-build-dependencies
+RUN mkdir /usr/local/src \
+  && cd /usr/local/src \
+  && USER=root cargo new --bin neolink
+WORKDIR /usr/local/src/neolink
+COPY Cargo.toml Cargo.lock ./
+RUN cargo build-dependencies --release
+
+# Build the main program
+COPY . /usr/local/src/neolink
+RUN cargo build --release
+
+# Create the release container. Match the base OS used to build
+FROM docker.io/alpine:latest
+
+RUN apk add --no-cache -X http://dl-cdn.alpinelinux.org/alpine/edge/testing gst-rtsp-server
+RUN apk add libgcc
+
+COPY --from=build \
+  /usr/local/src/neolink/target/release/neolink \
+  /usr/local/bin/neolink
+COPY docker/entrypoint.sh /entrypoint.sh
+
+CMD ["/usr/local/bin/neolink", "--config", "/etc/neolink.toml"]
+ENTRYPOINT ["/entrypoint.sh"]
+EXPOSE 8554 

docker/entrypoint.sh

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+#!/bin/sh
+
+# Allows Ctrl-C, by letting this sh process act as PID 1
+exit_func() {
+    exit 1
+}
+trap exit_func SIGTERM SIGINT
+
+"$@"