Setup some Gitpod magic

I'll do the custom Dockerfile setup soon.

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

.gitpod.yml

+ports:
+- port: 8000
+tasks:
+- init: |
+    python3 -m venv .venv
+    source .venv/bin/activate
+    pip3 install -r requirements.txt
+
+    npm install
+  command: |
+    source .venv/bin/activate
+    mkdocs serve