feat: Update Dockerfile to be based on Alpine

.devcontainer/Dockerfile

@@ -1,56 +1,54 @@
-ARG BASE_IMAGE=docker.io/ubuntu:oracular-20241120
+ARG BASE_IMAGE=docker.io/alpine:3.21.2
 
 ###
 # Build eCAL 6 from source
 ###
 FROM ${BASE_IMAGE} AS builder
 
-RUN apt-get update && apt-get install --no-install-recommends  -y\
-    ca-certificates \
+RUN apk add --no-cache \
+    asio-dev \
     cmake \
     g++ \
     git \
-    libasio-dev \
-    libprotobuf-dev \
-    libprotoc-dev \
-    libtclap-dev \
-    libyaml-cpp-dev \
-    ninja-build \
-    protobuf-compiler \
-    && rm -rf /var/lib/apt/lists/*
+    ninja-is-really-ninja \
+    protobuf-dev \
+    tclap-dev \
+    yaml-cpp-dev \
+    # fts functions which are missing musl libc
+    musl-fts-dev
 
 # filter=tree:0 will fetch the commits but their trees will be fetched on-demand
 # So we end up with the full commit history but only download trees for HEAD
 # This is needed over shallow clone for the tag-based auto-versioning
 # Reset added to ensure the same commit is always used, even if master advances
-RUN git clone --single-branch --filter=tree:0 --branch master https://github.com/eclipse-ecal/ecal.git /ecal \
-    && git -C ./ecal reset --hard 00f8ef0a2af296911e7de661e9c5f61a68abf809
-WORKDIR /ecal
-
-# Only download the submodules for dependencies not available as system packages
-RUN git submodule update --init --single-branch --depth 1 \
+RUN git clone --single-branch --filter=tree:0 --branch alpine https://github.com/DownerCase/ecal.git /ecal \
+    && git -C /ecal reset --hard c9e9a489e44420899693bba7360ce1e235d691e6 \
+    # Only download the submodules for dependencies not available as system packages
+    && git -C /ecal submodule update --init --single-branch --depth 1 \
     thirdparty/recycle/recycle \
     thirdparty/tcp_pubsub/tcp_pubsub \
     thirdparty/ecaludp/ecaludp
 
+WORKDIR /ecal
+
 # TODO: Blocker for installing to / or / usr
 # - Fix usage of `INSTALL_INCLUDE_DIR` instead of `eCAL_install_include_dir`
 # - Get CMakeFunctions to use GNUInstallDirs
 
-# Configure a minimal build with less vendored dependencies
-RUN cmake --preset core -G Ninja \
- -DCMAKE_BUILD_TYPE=Release \
- -DCMAKE_STAGING_PREFIX=staging \
- -DBUILD_TIME=OFF \
- -DECAL_THIRDPARTY_BUILD_ASIO=OFF \
- -DECAL_THIRDPARTY_BUILD_PROTOBUF=OFF \
- -DECAL_THIRDPARTY_BUILD_YAML-CPP=OFF \
- -DECAL_THIRDPARTY_BUILD_TCLAP=OFF
-
-RUN cmake --build --preset core
-
-# Component based install avoids the unneeded `app` component
-RUN cmake --install ./out/core/build --strip --component configuration \
+RUN \
+    # Configure a minimal build with less vendored dependencies
+    cmake --preset core -G Ninja \
+    -DCMAKE_BUILD_TYPE=Release \
+    -DCMAKE_STAGING_PREFIX=staging \
+    -DBUILD_TIME=OFF \
+    -DECAL_THIRDPARTY_BUILD_ASIO=OFF \
+    -DECAL_THIRDPARTY_BUILD_PROTOBUF=OFF \
+    -DECAL_THIRDPARTY_BUILD_YAML-CPP=OFF \
+    -DECAL_THIRDPARTY_BUILD_TCLAP=OFF \
+    # Build core preset
+    &&  cmake --build --preset core \
+    # Component based install avoids the unneeded `app` component
+    && cmake --install ./out/core/build --strip --component configuration \
     && cmake --install ./out/core/build --strip --component sdk \
     && cmake --install ./out/core/build --strip --component Unspecified
 
@@ -61,36 +59,28 @@ FROM ${BASE_IMAGE} AS dev-base
 
 LABEL org.opencontainers.image.source https://github.com/downercase/ecal-go
 
-RUN apt-get update && apt-get install --no-install-recommends  -y\
-    g++ \
-    libyaml-cpp0.8 \
-    && rm -rf /var/lib/apt/lists/*
-
-# copy the ca-certificate.crt from the build stage
-COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
-
 COPY --from=builder /ecal/staging /usr/local
 
-# Update dynamic linker so it knows about our new libraries
-RUN ldconfig
-
 ###
 # Dev build-stage, for consuming eCAL and building/testing the C interface library
 ###
 FROM dev-base AS dev-cpp
 
-RUN apt-get update && apt-get install --no-install-recommends  -y\
+RUN apk add --no-cache \
     cmake \
-    libprotobuf-dev \
-    ninja-build \
-    && rm -rf /var/lib/apt/lists/*
+    g++ \
+    protobuf-dev \
+    # Ninja build compatible
+    samurai
 
 ###
 # Dev build-stage, for consuming eCAL and building/testing the Go code
 ###
 FROM dev-base AS dev-go
 
-RUN apt-get update && apt-get install --no-install-recommends  -y\
-    golang \
-    && rm -rf /var/lib/apt/lists/*
+RUN apk add --no-cache \
+    g++ \
+    go \
+    musl-fts \
+    yaml-cpp