build: devcontainer support

.devcontainer/Dockerfile

@@ -0,0 +1,59 @@
+# Use the official VS Code base image for dev containers
+FROM mcr.microsoft.com/devcontainers/base:ubuntu
+
+# Install dependencies
+RUN apt-get update && apt-get install -y \
+    build-essential \
+    libssl-dev \
+    pkg-config \
+    clang \
+    cmake \
+    llvm \
+    curl \
+    gnupg \
+    lsb-release \
+    software-properties-common \
+    unzip
+
+# Switch to clang
+RUN rm /usr/bin/cc && ln -s /usr/bin/clang /usr/bin/cc
+
+# Install protoc - protobuf compiler
+# The one shipped with Alpine does not work
+ARG TARGETARCH
+ARG PROTOC_VERSION=25.2
+RUN if [[ "$TARGETARCH" == "arm64" ]] ; then export PROTOC_ARCH=aarch_64; else export PROTOC_ARCH=x86_64; fi; \
+    curl -Ls https://github.com/protocolbuffers/protobuf/releases/download/v${PROTOC_VERSION}/protoc-${PROTOC_VERSION}-linux-${PROTOC_ARCH}.zip \
+    -o /tmp/protoc.zip && \
+    unzip -qd /opt/protoc /tmp/protoc.zip && \
+    rm /tmp/protoc.zip && \
+    ln -s /opt/protoc/bin/protoc /usr/bin/
+
+# Install protoc v25.2+
+RUN curl -OL https://github.com/protocolbuffers/protobuf/releases/download/v25.2/protoc-25.2-linux-x86_64.zip \
+    && unzip protoc-25.2-linux-x86_64.zip -d /usr/local \
+    && rm protoc-25.2-linux-x86_64.zip
+
+# Switch to vscode user
+USER vscode
+
+ENV CARGO_HOME=/home/vscode/.cargo
+ENV PATH=$CARGO_HOME/bin:$PATH
+
+# TODO: It doesn't sharing PATH between stages, so we need "source $HOME/.cargo/env" everywhere
+COPY rust-toolchain.toml .
+RUN TOOLCHAIN_VERSION="$(grep channel rust-toolchain.toml | awk '{print $3}' | tr -d '"')" && \
+    curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- \
+    --profile minimal \
+    -y \
+    --default-toolchain "${TOOLCHAIN_VERSION}" \
+    --target wasm32-unknown-unknown
+
+# Install wasm-bindgen-cli in the same profile as other components, to sacrifice some performance & disk space to gain
+# better build caching
+RUN if [[ -z "${SCCACHE_MEMCACHED}" ]] ; then unset SCCACHE_MEMCACHED ; fi ; \
+    RUSTFLAGS="-C target-feature=-crt-static" \
+    # Meanwhile if you want to update wasm-bindgen you also need to update version in:
+    #  - packages/wasm-dpp/Cargo.toml
+    #  - packages/wasm-dpp/scripts/build-wasm.sh
+    cargo install [email protected] --locked

.devcontainer/devcontainer.json

@@ -0,0 +1,74 @@
+{
+  "name": "Dash Platform Dev Container",
+  "build": {
+    "dockerfile": "Dockerfile",
+    "context": ".."
+  },
+  "customizations": {
+    "vscode": {
+      "settings": {},
+      "extensions": [
+        "arcanis.vscode-zipfs",
+        "chrmarti.regex",
+        "davidanson.vscode-markdownlint",
+        "arcanis.vscode-zipfs",
+        "ms-vscode.cmake-tools",
+        "dbaeumer.vscode-eslint",
+        "esbenp.prettier-vscode",
+        "vadimcn.vscode-lldb",
+        "rust-lang.rust-analyzer",
+        "tamasfe.even-better-toml",
+        "zhangyue.rust-mod-generator",
+        "ms-azuretools.vscode-docker"
+      ]
+    }
+  },
+  "remoteUser": "vscode",
+  "mounts": [
+    {
+      "source": "devcontainer-platform-cargo-registry-index-${devcontainerId}",
+      "target": "/home/vscode/.cargo/registry",
+      "type": "volume"
+    },
+    {
+      "source": "devcontainer-platform-cargo-registry-cache-${devcontainerId}",
+      "target": "/home/vscode/.cargo/registry/cache",
+      "type": "volume"
+    },
+    {
+      "source": "devcontainer-platform-cargo-git-db-${devcontainerId}",
+      "target": "/home/vscode/.cargo/git/db",
+      "type": "volume"
+    },
+    {
+      "source": "devcontainer-platform-target-${devcontainerId}",
+      "target": "${containerWorkspaceFolder}/target",
+      "type": "volume"
+    }
+  ],
+  "features": {
+    "ghcr.io/devcontainers/features/common-utils:2": {
+      "installZsh": "true",
+      "username": "vscode",
+      "userUid": "1000",
+      "userGid": "1000",
+      "upgradePackages": "true"
+    },
+    "ghcr.io/devcontainers/features/git:1": {
+      "version": "latest",
+      "ppa": "false"
+    },
+    "ghcr.io/devcontainers/features/github-cli:1": {},
+    "ghcr.io/devcontainers/features/node:1": {
+      "version": 20,
+      "installYarnUsingApt": false,
+    },
+    "ghcr.io/eitsupi/devcontainer-features/jq-likes:2": {},
+    "ghcr.io/devcontainers/features/docker-in-docker:2": {},
+    "ghcr.io/schlich/devcontainer-features/starship:0": {},
+  },
+  "postCreateCommand": {
+    "git-safe": "git config --global --add safe.directory ${containerWorkspaceFolder}",
+    "cargo-permissions": "sudo chown -R vscode:vscode /home/vscode/.cargo ${containerWorkspaceFolder}/target"
+  }
+}