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