dev: add Dev Container

+ Update and move Dockerfile to .devcontainer;

.devcontainer/Dockerfile

@@ -0,0 +1,34 @@
+FROM archlinux:latest AS root
+
+ENV LANG=C.UTF-8
+
+RUN pacman -Syu --noconfirm make parallel wget cmake ninja verilator git llvm clang python autoconf automake
+
+RUN pacman -Syu --noconfirm vim which
+
+# Install GraalVM Ref: https://github.com/chipsalliance/chisel/blob/86b2a7d3f7807ca0d1d8a725bd87ee4be1f61007/.devcontainer/Dockerfile#L32-L40
+# This downloads all relevant GraalVM architectures at once, mostly because $TARGETARCH values don't map exactly to the release URLs. Since we're optimizing for developer experience here and not image size, this is OK
+# GraalVM release links can be found here: https://github.com/graalvm/graalvm-ce-builds/releases
+ENV JAVA_VERSION=java11
+#ADD https://github.com/graalvm/graalvm-ce-builds/releases/download/vm-22.3.1/graalvm-ce-$JAVA_VERSION-linux-aarch64-22.3.1.tar.gz /graalvm/tarballs/arm64.tar.gz
+ADD https://github.com/graalvm/graalvm-ce-builds/releases/download/vm-22.3.1/graalvm-ce-$JAVA_VERSION-linux-amd64-22.3.1.tar.gz /graalvm/tarballs/amd64.tar.gz
+#RUN tar -xzf /graalvm/tarballs/$TARGETARCH.tar.gz -C /graalvm --strip-components=1
+RUN tar -xzf /graalvm/tarballs/amd64.tar.gz -C /graalvm --strip-components=1
+ENV JAVA_HOME=/graalvm
+ENV PATH=$JAVA_HOME/bin/:$PATH
+
+# Download and install mill
+RUN curl -L https://github.com/com-lihaoyi/mill/releases/download/0.11.5/0.11.5 > mill && \
+    chmod +x mill && \
+    mv mill /usr/bin/mill
+
+# ivy development dependencies
+RUN cd /tmp && \
+    git clone https://github.com/SingularityKChen/chisel-chipware.git
+RUN cd /tmp/chisel-chipware && \
+    mill -i -j 0 __.compile && \
+    mill -i -j 0 __.reformat && \
+    cd .. && \
+    rm -rf chisel-chipware
+
+CMD ["/usr/bin/bash"]

.devcontainer/devcontainer.json

@@ -0,0 +1,7 @@
+{
+    "name": "ViTA Dev",
+    "build": {
+        // Path is relative to the devcontainer.json file.
+        "dockerfile": "Dockerfile"
+    }
+}

Makefile

@@ -29,7 +29,7 @@ doc:
 	utils/mill -j 0 show __.docJar
 
 build_docker:
-	docker build -f docker/Dockerfile -t chisel-chipware:latest .
+	docker build -f .devcontainer/Dockerfile -t chisel-chipware:latest .
 
 run_docker: build_docker
 	docker run -it --rm -v $(shell pwd):/workspace/$(shell basename $$(pwd)) --workdir /workspace/$(shell basename $$(pwd)) chisel-chipware:latest