devcontainer appears to be working now.

.devcontainer/Dockerfile

@@ -0,0 +1,20 @@
+# See here for image contents: https://github.com/microsoft/vscode-dev-containers/tree/v0.194.3/containers/go/.devcontainer/base.Dockerfile
+
+# [Choice] Go version: 1, 1.16, 1.17
+ARG VARIANT="1.17"
+FROM mcr.microsoft.com/vscode/devcontainers/go:0-${VARIANT}
+
+# [Choice] Node.js version: none, lts/*, 16, 14, 12, 10
+ARG NODE_VERSION="none"
+RUN if [ "${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 \
+#     && apt-get -y install --no-install-recommends <your-package-list-here>
+RUN apt-get update && apt-get install -y --no-install-recommends libzmq3-dev libzmq5
+
+# [Optional] Uncomment the next line to use go get to install anything else you need
+# RUN go get -x <your-dependency-or-tool>
+
+# [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

@@ -1,42 +1,18 @@
 {
   "name": "GitHub Codespaces (Default)",
+  "extensions": [
+    "GitHub.vscode-pull-request-github",
+    "golang.go",
+    "hashicorp.terraform",
+    "wholroyd.hcl",
+    "github.copilot",
+    "golang.Go"
+  ],
   "build": {
-    "dockerfile": "docker/Dockerfile"
-  },
-  "settings": {
-    "go.toolsManagement.checkForUpdates": "local",
-    "go.useLanguageServer": true,
-    "go.gopath": "/go",
-    "go.goroot": "/usr/local/go/bin/go",
-    "go.linting.enabled": true,
-    "lldb.executable": "/usr/bin/lldb",
-    "files.watcherExclude": {
-    "**/target/**": true
+    "dockerfile": "Dockerfile",
+    "args": {
+      "VARIANT": "1.17",
+      "NODE_VERSION": "none"
     }
   },
-  "remoteUser": "codespace",
-  "overrideCommand": false,
-  "mounts": ["source=codespaces-linux-var-lib-docker,target=/var/lib/docker,type=volume"],
-  "runArgs": [
-    "--cap-add=SYS_PTRACE",
-    "--security-opt",
-    "seccomp=unconfined",
-    "--privileged",
-    "--init"
-  ],
-	
-  // Add the IDs of extensions you want installed when the container is created.
-  "extensions": [
-	"GitHub.vscode-pull-request-github",
-	"golang.go",
-	"hashicorp.terraform",
-	"wholroyd.hcl",
-	"github.copilot"
-  ],
-	
-  // Use 'forwardPorts' to make a list of ports inside the container available locally.
-  // "forwardPorts": [],
-
-  // "oryx build" will automatically install your dependencies and attempt to build your project
-  // "postCreateCommand": "oryx build -p virtualenv_name=.venv --log-file /tmp/oryx-build.log --manifest-dir /tmp || echo 'Could not auto-build. Skipping.'"
 }

.devcontainer/docker/Dockerfile

@@ -1 +0,0 @@
-FROM dragonheim/golang:1.17.1