Add Makefile, package.json, and initial configuration for VitePress and Slidev integration

- Introduced a Makefile for streamlined commands related to building, running, and managing presentations.
- Created package.json to define project metadata, dependencies, and scripts for development and testing.
- Added .gitignore entries to exclude build artifacts and temporary files from version control.
- Included playwright.config.mjs for end-to-end testing setup with Playwright.
- Added README.md for project documentation, outlining setup instructions and development guidelines.

server/Dockerfile

@@ -1,39 +0,0 @@
-# syntax=docker/dockerfile:1
-# Même logique que l’image upstream : UID/GID numériques, pas le nom « nginx ».
-# https://github.com/nginxinc/docker-nginx-unprivileged/blob/main/stable/alpine/Dockerfile
-FROM nginxinc/nginx-unprivileged:stable-alpine
-
-ARG UID=101
-ARG GID=101
-
-USER root
-RUN --mount=type=cache,target=/var/cache/apk \
-    apk add --no-cache git
-
-WORKDIR /usr/share/nginx/html
-
-ARG TALKS_REPO_URL=https://git.specificat.io/arnault/Talks.git
-ARG TALKS_BRANCH=main
-ARG TALKS_SPARSE_DIR=content
-
-RUN find . -mindepth 1 -delete \
-  && git clone --filter=blob:none --sparse --branch "${TALKS_BRANCH}" --single-branch "${TALKS_REPO_URL}" . \
-  && git sparse-checkout init --cone \
-  && git sparse-checkout set "${TALKS_SPARSE_DIR}"
-
-COPY nginx/default.conf /etc/nginx/conf.d/default.conf
-COPY refresh.sh /refresh.sh
-
-# Pas de « su 101 » : git config en root puis chown. HOME=/tmp : pas de /home artificiel dans une image stateless.
-RUN chmod +x /refresh.sh \
-  && chown -R "${UID}:${GID}" /usr/share/nginx/html /refresh.sh \
-  && HOME=/tmp git config --global --add safe.directory /usr/share/nginx/html \
-  && chown "${UID}:${GID}" /tmp/.gitconfig
-
-ENV HOME=/tmp
-
-USER ${UID}
-
-EXPOSE 8080
-
-CMD sh -c "/refresh.sh & exec nginx -g 'daemon off;'"