devcontainer: bump node version to 22 and update feature installation (#1017)

.devcontainer/Dockerfile

@@ -1,9 +1,5 @@
-FROM mcr.microsoft.com/vscode/devcontainers/typescript-node:20-bookworm
-ADD https://github.com/criyle/go-judge/releases/download/v1.8.0/go-judge_1.8.0_linux_amd64 /usr/bin/sandbox
-RUN npm install -g yarn && \
-    sudo apt-get update && sudo apt-get install gcc g++ && \
-    mkdir -p /root/.hydro /data/file && chmod +x /usr/bin/sandbox && \
-    chown -R root:root /root /root/.hydro /data/file && \
+FROM mcr.microsoft.com/vscode/devcontainers/typescript-node:22-bookworm
+
+RUN install -d -o root -g root /root/.hydro /data/file && \
     echo '{"uri":"mongodb://mongo/hydro"}' > /root/.hydro/config.json && \
     echo '["@hydrooj/ui-default","@hydrooj/hydrojudge"]' > /root/.hydro/addon.json
-ENTRYPOINT sandbox