Add autostart status and release builds

Dockerfile

@@ -4,11 +4,19 @@ FROM golang:1.22-bookworm
 # compiler plus OpenGL/X11 headers. --no-install-recommends keeps the image from
 # pulling in unrelated desktop packages that are not needed for compilation.
 RUN apt-get update && \
+    dpkg --add-architecture arm64 && \
+    apt-get update && \
     apt-get install -y --no-install-recommends \
         ca-certificates \
         gcc \
+        gcc-aarch64-linux-gnu \
+        gcc-mingw-w64-x86-64 \
+        binutils-mingw-w64-x86-64 \
+        pkg-config \
         libgl1-mesa-dev \
-        xorg-dev && \
+        xorg-dev \
+        libgl1-mesa-dev:arm64 \
+        xorg-dev:arm64 && \
     rm -rf /var/lib/apt/lists/*
 
 WORKDIR /src
@@ -20,12 +28,21 @@ RUN go mod download
 
 COPY . .
 
-# CGO is required by Fyne. The first Linux package target is linux/amd64; other
-# architectures can be added later as separate, explicit build targets.
-ENV CGO_ENABLED=1
-ENV GOOS=linux
-ENV GOARCH=amd64
-
-# -trimpath removes host paths from the binary, and -s -w strips symbol/debug
-# tables to keep the produced desktop executable smaller.
-RUN go build -trimpath -ldflags "-s -w" -o /out/pysentry ./cmd/pysentry
+# CGO is required by Fyne. This builder produces the release artifacts from
+# Linux: Linux amd64, Linux arm64, and a Windows amd64 binary cross-compiled with
+# MinGW. The Windows resource is generated inside the container so Explorer still
+# sees the application icon.
+RUN version="$(sed -n 's/^var Version = "\(.*\)"/\1/p' src/core/version.go)" && \
+    version="${version:-0.0.0-dev}" && \
+    mkdir -p /out/linux /out/windows && \
+    CGO_ENABLED=1 GOOS=linux GOARCH=amd64 \
+        go build -trimpath -ldflags "-s -w -X github.com/pysentry/pysentry/src/core.Version=${version}" \
+        -o "/out/linux/pysentry-${version}-linux-amd64" ./cmd/pysentry && \
+    CC=aarch64-linux-gnu-gcc CGO_ENABLED=1 GOOS=linux GOARCH=arm64 \
+        PKG_CONFIG_PATH=/usr/lib/aarch64-linux-gnu/pkgconfig \
+        go build -trimpath -ldflags "-s -w -X github.com/pysentry/pysentry/src/core.Version=${version}" \
+        -o "/out/linux/pysentry-${version}-linux-arm64" ./cmd/pysentry && \
+    x86_64-w64-mingw32-windres -O coff -o cmd/pysentry/rsrc_windows_amd64.syso packaging/windows/pysentry.rc && \
+    CC=x86_64-w64-mingw32-gcc CGO_ENABLED=1 GOOS=windows GOARCH=amd64 \
+        go build -trimpath -ldflags "-s -w -H=windowsgui -X github.com/pysentry/pysentry/src/core.Version=${version}" \
+        -o "/out/windows/pysentry-${version}-windows-amd64.exe" ./cmd/pysentry