adding dev container

.devcontainer/Dockerfile

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+# Dockerfile
+FROM mcr.microsoft.com/devcontainers/typescript-node:0-18
+
+# Install wget if not already installed
+RUN apt-get update && apt-get install -y wget
+
+# Install Gatsby CLI and Yarn
+RUN npm install -g gatsby-cli yarn
+# Let's get the latest version of Yarn
+RUN corepack enable
+RUN yarn set version berry
+
+# Download .zshrc from remote address
+# RUN sh -c "$(wget https://raw.github.com/robbyrussell/oh-my-zsh/master/tools/install.sh -O -)"
+USER node
+RUN wget https://raw.githubusercontent.com/Riverscapes/environment/master/nar-ys.zsh-theme -O ~/.oh-my-zsh/custom/themes/nar-ys.zsh-theme
+RUN wget https://raw.githubusercontent.com/Riverscapes/environment/master/.aliases -O ~/.aliases
+RUN wget https://raw.githubusercontent.com/Riverscapes/environment/master/.zshrc -O ~/.zshrc
+
+# set memory to 8Gb so that Gatsby has a chance
+ENV NODE_OPTIONS=--max-old-space-size=8192
+ENV GATSBY_CPU_COUNT=2
+

.devcontainer/devcontainer.json

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+{
+  "dockerFile": "Dockerfile",
+  "name": "Gatsby Docs Dev Container",
+  "waitFor": "onCreateCommand",
+  // On container creation, install dependencies.
+  "postCreateCommand": "yarn install",
+  // Build and run the dev site on container start.
+  "postAttachCommand": "cd docs; yarn build; yarn serve",
+  "customizations": {
+    "vscode": {
+      "extensions": [
+        "GitHub.copilot",
+        "GitHub.copilot-chat",
+        "eriklynd.json-tools",
+        "yzhang.markdown-all-in-one",
+        "unifiedjs.vscode-mdx",
+        "dbaeumer.vscode-eslint",
+        "christian-kohler.npm-intellisense",
+        "mhutchie.git-graph",
+        "GraphQL.vscode-graphql",
+        "GraphQL.vscode-graphql-syntax"
+      ]
+    }
+  },
+  // Trigger actions on ports. More info: https://containers.dev/implementors/json_reference/#port-attributes
+  "portsAttributes": {
+    "8000": {
+      "label": "Application",
+      "onAutoForward": "openPreview"
+    }
+  },
+  // Use 'forwardPorts' to make a list of ports inside the container available locally.
+  "forwardPorts": [
+    8000
+  ]
+}