Release 0.1.0: MIT license, changelog, multi-arch Docker image without CLI builds

- LICENSE (MIT), CHANGELOG for 0.1.0, README overhaul
- docker-compose.release.yml pulling the registry image
- Dockerfile cross-compiles the server with cargo-zigbuild for amd64 and arm64;
  the terminal client is no longer built into the image
- Server, install script and settings point to a source install of the
  terminal client when no prebuilt binaries are available (/info: cli_builds)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Dockerfile

@@ -1,16 +1,35 @@
 # syntax=docker/dockerfile:1
 
+# Multi-arch: the web UI and the server are built once on the build
+# machine (cross-compiled with cargo-zigbuild); only the runtime stage runs
+# per target platform.
+
 # --- web UI (PWA) -------------------------------------------------------------
-FROM node:22-alpine AS web
+FROM --platform=$BUILDPLATFORM node:22-alpine AS web
 WORKDIR /web
 COPY web/package.json web/package-lock.json ./
 RUN npm ci --no-audit --no-fund
 COPY web/ ./
 RUN npm run build
 
-# --- server -------------------------------------------------------------------
-FROM rust:1-bookworm AS server
+# --- Rust toolchain with zig for cross-compiling --------------------------------
+FROM --platform=$BUILDPLATFORM rust:1-bookworm AS toolchain
+RUN apt-get update && apt-get install -y --no-install-recommends cmake xz-utils && rm -rf /var/lib/apt/lists/*
+ARG ZIG_VERSION=0.17.1
+RUN curl -fsSL https://ziglang.org/download/${ZIG_VERSION}/zig-$(uname -m)-linux-${ZIG_VERSION}.tar.xz | tar -xJ -C /opt \
+    && ln -s /opt/zig-*/zig /usr/local/bin/zig \
+    && cargo install --locked cargo-zigbuild \
+    && rustup target add x86_64-unknown-linux-gnu aarch64-unknown-linux-gnu
 WORKDIR /src
+
+# --- server (for the target platform, glibc of Debian bookworm) ----------------
+FROM toolchain AS server
+ARG TARGETARCH
+RUN case "$TARGETARCH" in \
+        amd64) echo x86_64-unknown-linux-gnu ;; \
+        arm64) echo aarch64-unknown-linux-gnu ;; \
+        *) echo "unsupported architecture $TARGETARCH" >&2; exit 1 ;; \
+    esac > /target
 COPY config.example.toml ./
 COPY Cargo.toml Cargo.lock ./
 COPY core/Cargo.toml ./core/
@@ -19,33 +38,16 @@ COPY cli/Cargo.toml ./cli/
 # Cache dependencies separately from the sources (stub crates first).
 RUN mkdir -p core/src server/src cli/src \
     && echo '' > core/src/lib.rs && echo 'fn main(){}' > server/src/main.rs && echo 'fn main(){}' > cli/src/main.rs \
-    && cargo build --release -p codecraft && rm -rf core/src server/src cli/src
+    && cargo zigbuild --release -p codecraft --target "$(cat /target).2.36" && rm -rf core/src server/src cli/src
 COPY core/src ./core/src
 COPY server/src ./server/src
 COPY server/resources-cli ./server/resources-cli
 COPY cli/src ./cli/src
 ARG GIT_COMMIT=""
 ENV CODECRAFT_COMMIT=${GIT_COMMIT}
-RUN touch core/src/lib.rs server/src/main.rs && cargo build --release -p codecraft
-
-# --- terminal client (static Linux binaries for x86_64 and aarch64) -----------
-FROM rust:1-bookworm AS cli
-RUN apt-get update && apt-get install -y --no-install-recommends cmake xz-utils && rm -rf /var/lib/apt/lists/*
-ARG ZIG_VERSION=0.17.1
-RUN curl -fsSL https://ziglang.org/download/${ZIG_VERSION}/zig-$(uname -m)-linux-${ZIG_VERSION}.tar.xz | tar -xJ -C /opt \
-    && ln -s /opt/zig-*/zig /usr/local/bin/zig \
-    && cargo install --locked cargo-zigbuild \
-    && rustup target add x86_64-unknown-linux-musl aarch64-unknown-linux-musl
-WORKDIR /src
-COPY Cargo.toml Cargo.lock ./
-COPY core ./core
-COPY server/Cargo.toml ./server/
-COPY server/resources ./server/resources
-COPY cli ./cli
-RUN mkdir -p server/src && echo 'fn main(){}' > server/src/main.rs \
-    && cargo zigbuild --release -p codecraft-cli --target x86_64-unknown-linux-musl --target aarch64-unknown-linux-musl \
-    && mkdir -p /out && cp target/x86_64-unknown-linux-musl/release/codecraft /out/codecraft-linux-x86_64 \
-    && cp target/aarch64-unknown-linux-musl/release/codecraft /out/codecraft-linux-aarch64
+RUN touch core/src/lib.rs server/src/main.rs \
+    && cargo zigbuild --release -p codecraft --target "$(cat /target).2.36" \
+    && cp "target/$(cat /target)/release/codecraft" /codecraft
 
 # --- runtime ------------------------------------------------------------------
 # Node is included so agents can work on JS projects and run npx-based MCP servers.
@@ -62,9 +64,8 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
 # Language servers for diagnostics after edits (rust-analyzer/gopls/clangd can be
 # installed by agents: rustup component add rust-analyzer, go install …).
 RUN npm install -g typescript@5 typescript-language-server pyright && npm cache clean --force
-COPY --from=server /src/target/release/codecraft /usr/local/bin/codecraft
+COPY --from=server /codecraft /usr/local/bin/codecraft
 COPY --from=web /web/dist /app/web
-COPY --from=cli /out /app/cli
 COPY server/ghidra /app/ghidra
 COPY server/resources /app/resources
 # The agent's home lives on the data volume: tools it installs in user space