Update the devcontainer (home-assistant#128)

Currently, the devcontainer no longer builds (presumably due to outdated
GPG keys). Bump to latest version and pin the Debian version as well.

.devcontainer/Dockerfile

@@ -1,11 +1,10 @@
 # [Choice] Go version: 1, 1.15, 1.14
-ARG VARIANT=1
+ARG VARIANT=1-bullseye
 FROM mcr.microsoft.com/vscode/devcontainers/go:${VARIANT}
 
 # [Option] Install Node.js
-ARG INSTALL_NODE="true"
 ARG NODE_VERSION="lts/*"
-RUN if [ "${INSTALL_NODE}" = "true" ]; then su vscode -c "source /usr/local/share/nvm/nvm.sh && nvm install ${NODE_VERSION} 2>&1"; fi
+RUN if [ "${NODE_VERSION}" != "none" ]; then su vscode -c "umask 0002 && . /usr/local/share/nvm/nvm.sh && nvm install ${NODE_VERSION} 2>&1"; fi
 
 # [Optional] Uncomment this section to install additional OS packages.
 RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
@@ -17,9 +16,9 @@ RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
 
 
 # [Optional] Uncomment the next line to use go get to install anything else you need
-RUN go get -x github.com/coreos/go-systemd/daemon
-RUN go get -x github.com/fntlnz/mountinfo
-RUN go get -x github.com/godbus/dbus
+# RUN go get -x github.com/coreos/go-systemd/daemon
+# RUN go get -x github.com/fntlnz/mountinfo
+# RUN go get -x github.com/godbus/dbus
 
 # [Optional] Uncomment this line to install global node packages.
 # RUN su vscode -c "source /usr/local/share/nvm/nvm.sh && npm install -g <your-package-here>" 2>&1

.devcontainer/devcontainer.json

@@ -3,9 +3,8 @@
 	"build": {
 		"dockerfile": "Dockerfile",
 		"args": {
-			"VARIANT": "1.15",
-			"INSTALL_NODE": "false",
-			"NODE_VERSION": "lts/*"
+			"VARIANT": "1.19-bullseye",
+			"NODE_VERSION": "none"
 		}
 	},
 	"postCreateCommand": "go mod download",