Add Dockerfile for build env and workflow to build it

.github/workflows/build-ci-image.yaml

@@ -0,0 +1,36 @@
+name: Build CI image
+
+on:
+  push:
+    branches: [main]
+    paths:
+      - 'Dockerfile'
+      - '.github/workflows/build-ci-image.yaml'
+  workflow_dispatch:
+
+env:
+  IMAGE: YOUR_DOCKERHUB_USERNAME/stack-wallet-ci
+
+jobs:
+  build:
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@v6
+
+      - uses: docker/setup-buildx-action@v4
+
+      - uses: docker/login-action@v4
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Build and push
+        uses: docker/build-push-action@v7
+        with:
+          context: .
+          push: true
+          tags: |
+            ${{ env.IMAGE }}:latest
+            ${{ env.IMAGE }}:${{ github.sha }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max

Dockerfile

@@ -0,0 +1,46 @@
+# syntax=docker/dockerfile:1.7
+FROM ubuntu:24.04
+
+ENV DEBIAN_FRONTEND=noninteractive \
+    TZ=Etc/UTC \
+    LANG=C.UTF-8 \
+    LC_ALL=C.UTF-8
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+      ca-certificates curl git gnupg sudo xz-utils file python3 unzip \
+      build-essential automake cmake meson ninja-build pkg-config libtool \
+      libglib2.0-dev libgtk-3-dev liblzma-dev \
+      libgcrypt20-dev libgirepository1.0-dev \
+      openjdk-8-jre-headless libgit2-dev clang \
+      libncurses5-dev libncursesw5-dev zlib1g-dev llvm debhelper \
+      libclang-dev opencl-headers libssl-dev ocl-icd-opencl-dev \
+      libc6-dev-i386 valac libtss2-dev \
+ && rm -rf /var/lib/apt/lists/*
+
+SHELL ["/bin/bash", "-o", "pipefail", "-c"]
+
+RUN curl -fsSL https://deb.nodesource.com/setup_24.x | bash - \
+ && apt-get install -y --no-install-recommends nodejs \
+ && rm -rf /var/lib/apt/lists/*
+
+ENV RUSTUP_HOME=/usr/local/rustup \
+    CARGO_HOME=/usr/local/cargo \
+    PATH=/usr/local/cargo/bin:$PATH
+
+RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs \
+      | sh -s -- -y --default-toolchain 1.89.0 --profile minimal --no-modify-path \
+ && rustup install 1.85.1 --profile minimal \
+ && rustup target add x86_64-unknown-linux-gnu --toolchain 1.89.0 \
+ && cargo install cargo-ndk \
+ && chmod -R a+rwX "$CARGO_HOME" "$RUSTUP_HOME"
+
+ENV FLUTTER_HOME=/opt/flutter \
+    PATH=/opt/flutter/bin:/opt/flutter/bin/cache/dart-sdk/bin:$PATH
+
+RUN git clone --depth 1 --branch 3.38.1 https://github.com/flutter/flutter.git "$FLUTTER_HOME" \
+ && git config --global --add safe.directory '*' \
+ && flutter config --no-analytics \
+ && flutter precache --linux \
+ && chmod -R a+rwX "$FLUTTER_HOME"
+
+RUN flutter --version && rustc --version && cargo --version && node --version