Initial commit of new flow

.devcontainer/Dockerfile

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+FROM pandoc/latex:2.14.0.1
+
+RUN apk add --no-cache git=2.26.3-r0 texlive=20190410-r13 && \
+    tlmgr update --self && \
+    tlmgr install tikz-cd && \
+    tlmgr install mdframed && \
+    # Dependencies of mdframed \
+    tlmgr install zref && \
+    tlmgr install needspace

.devcontainer/devcontainer.json

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+{
+  "build": { "dockerfile": "Dockerfile" },
+  "extensions": ["james-yu.latex-workshop", "vscodevim.vim", "timonwong.shellcheck"],
+  "settings": {
+
+  }
+}