chore(gitpod): migrate Classic Gitpod config to devcontainers

Spoiler: Gitpod tasks are now under the automations.yaml file, along
side support for services in Gitpod Flex. :)

Signed-off-by: Andrei Jiroh Halili <ajhalili2006@andreijiroh.dev>

.devcontainer/Dockerfile

@@ -0,0 +1,29 @@
+# syntax=docker/dockerfile:1
+FROM gitpod/workspace-full:latest as workspace
+
+WORKDIR /tmp
+# setup work for scdoc and hut cli
+RUN git clone https://git.sr.ht/~sircmpwn/scdoc && cd scdoc \
+    && make && sudo cp scdoc /usr/local/bin/scdoc && cd .. \
+    && git clone https://git.sr.ht/~emersion/hut && cd hut \
+    && make PREFIX=/home/gitpod/.local && sudo cp ./hut /usr/local/bin/hut \
+    && sudo rm -rv /tmp/*
+
+# https://squidfunk.github.io/mkdocs-material/setup/setting-up-social-cards/#linux
+RUN sudo install-packages \
+      libcairo2-dev \
+      libfreetype6-dev \
+      libffi-dev \
+      libjpeg-dev \
+      libpng-dev \
+      libz-dev
+
+# https://docs.docker.com/build/install-buildx/
+COPY --from=docker/buildx-bin:latest /buildx /usr/libexec/docker/cli-plugins/docker-buildx
+
+# brew maintenance + install ShellCheck and Hadolint
+WORKDIR /home/gitpod
+RUN brew update && brew upgrade \
+    && brew install hadolint shellcheck \
+    && npm i -g wrangler \
+    && git -C ~/.pyenv pull origin master

.devcontainer/devcontainer.json

@@ -0,0 +1,31 @@
+// The Dev Container format allows you to configure your environment. At the heart of it
+// is a Docker image or Dockerfile which controls the tools available in your environment.
+//
+// See https://aka.ms/devcontainer.json for more information.
+{
+	"name": "Gitpod",
+	// Use "image": "mcr.microsoft.com/vscode/devcontainers/base:ubuntu",
+	// instead of the build to use a pre-built image.
+	"build": {
+        "context": ".",
+        "dockerfile": "Dockerfile"
+    },
+	// Features add additional features to your environment. See https://containers.dev/features
+	// Beware: features are not supported on all platforms and may have unintended side-effects.
+	"features": {
+        "ghcr.io/devcontainers/features/docker-in-docker:2": {}
+    },
+	"remoteUser": "gitpod",
+	"customizations": {
+		"vscode": {
+			"extensions": [
+				"foam.foam-vscode",
+				"DavidAnson.vscode-markdownlint",
+				"timonwong.shellcheck",
+				"ms-azuretools.vscode-docker",
+				"vivaxy.vscode-conventional-commits",
+				"akosyakov.gitpod-monitor"
+			]
+		}
+	}
+}

.gitpod/automations.yaml

@@ -0,0 +1,5 @@
+tasks:
+  devserver:
+    name: Run dev server
+    command: pipenv install && pipenv run dev
+    triggeredBy: [manual,postDevcontainerStart]