feat: add gh workflow.

.github/workflows/mdbook.yml

@@ -0,0 +1,26 @@
+name: Build, test and deploy mdbook tech docs
+
+on:
+  # SWITCH TO [ master ] FOR push ONLY BEFORE LANDING
+  push:
+    branches: [ "*" ]
+  pull_request:
+    branches: [ "*" ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write       # To push a branch
+      pull-requests: write  # To create a PR from that branch
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+      - run: (test -x $HOME/.cargo/bin/mdbook || cargo install mdbook)
+      - run: mdbook build tech-docs && mdbook test tech-docs
+      - uses: JamesIves/[email protected]
+        with:
+          branch: gh-pages # The branch the action should deploy to.
+          folder: book # The folder the action should deploy.

tech-docs/src/chapter_1.md

@@ -1,3 +1,3 @@
 # Ecobalyse — Documentation technique
 
-This is cool.
+This is a test, don't panic.