add dev-container

allow docker-in-docker

.devcontainer/Dockerfile

@@ -0,0 +1,11 @@
+FROM mcr.microsoft.com/devcontainers/go:bullseye
+
+RUN apt-get update && apt-get install -y \
+      curl \
+      git \
+    && rm -rf /var/lib/apt/lists/*
+
+RUN go install mvdan.cc/gofumpt@latest
+ENV PATH="/root/go/bin:${PATH}"
+RUN curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin v1.50.0
+RUN golangci-lint --version

.devcontainer/devcontainer.json

@@ -0,0 +1,54 @@
+{
+  "name": "Docker in Docker",
+  "build": {
+    "dockerfile": "./Dockerfile",
+    "context": "."
+  },
+  "features": {
+    "ghcr.io/devcontainers/features/common-utils:1": {
+      "installZsh": "true",
+      "upgradePackages": "false",
+      "uid": "1000",
+      "gid": "1000",
+      "installOhMyZsh": "true",
+      "nonFreePackages": "true"
+    },
+    "ghcr.io/devcontainers/features/docker-from-docker:1": {
+      "version": "latest",
+      "enableNonRootDocker": "true",
+      "moby": "true"
+    },
+    "ghcr.io/devcontainers/features/git:1": {},
+    "ghcr.io/devcontainers/features/go:1": {}
+  },
+  // Configure tool-specific properties.
+  "customizations": {
+    // Configure properties specific to VS Code.
+    "vscode": {
+      // Set *default* container specific settings.json values on container create.
+      "settings": {
+        "go.toolsManagement.checkForUpdates": "local",
+        "go.useLanguageServer": true,
+        "go.gopath": "~/go",
+        "[go]": {
+          "editor.formatOnSave": true,
+          "editor.codeActionsOnSave": {
+            "source.organizeImports": true
+          }
+        },
+        "go.lintTool": "golangci-lint",
+        "gopls": {
+          "formatting.gofumpt": true,
+          "usePlaceholders": false // add parameter placeholders when completing a function
+        },
+        "files.eol": "\n"
+      },
+      // Add the IDs of extensions you want installed when the container is created.
+      "extensions": [
+        "golang.Go"
+      ]
+    }
+  }
+  // TODO: make this work.
+  // "postStartCommand": "echo \"alias gr=\\\"go run /workspaces/lazydocker/main.go\\\"\" >> ~/.zhsrc"
+}