refactor: réorganiser Dockerfiles et scripts par module

Réorganise la structure Docker pour plus de cohérence dans le monorepo.
Chaque module (backend, docs) a maintenant ses propres Dockerfiles et scripts.

Changements:
- backend/docker/ : Dockerfile (prod) + dev.Dockerfile (hot reload) + init script
- docs/docker/ : mkdocs.Dockerfile + pdf.Dockerfile
- docs/scripts/ : generate-bdd-docs.py + generate-pdf-docs.py
- Déplace docker-compose.yml dans backend/
- Supprime scripts obsolètes (fix-markdown-*.sh, remove-broken-links.sh)
- Déplace .dockerignore à la racine
- Met à jour Makefile avec nouveaux chemins

Organisation finale:
- backend/ : tout ce qui concerne l'API backend
- docs/ : tout ce qui concerne la documentation
- scripts/ : uniquement setup.sh (scripts généraux du projet)

backend/docker/Dockerfile

@@ -0,0 +1,33 @@
+# Builder stage
+FROM golang:1.23-alpine AS builder
+
+RUN apk add --no-cache git ca-certificates
+
+WORKDIR /app
+
+# Copy go mod files
+COPY go.mod go.sum ./
+RUN go mod download
+
+# Copy source code
+COPY . .
+
+# Build the application
+RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -ldflags="-w -s" -o /bin/api ./cmd/api
+
+# Final stage
+FROM alpine:latest
+
+RUN apk --no-cache add ca-certificates ffmpeg
+
+WORKDIR /root/
+
+# Copy binary from builder
+COPY --from=builder /bin/api .
+
+# Copy config files
+COPY config/ ./config/
+
+EXPOSE 8080
+
+CMD ["./api"]

backend/docker/dev.Dockerfile

@@ -0,0 +1,25 @@
+FROM golang:1.23-alpine
+
+RUN apk add --no-cache git ca-certificates make
+
+# Install Air for hot reload
+RUN go install github.com/cosmtrek/air@latest
+
+# Install sqlc
+RUN go install github.com/sqlc-dev/sqlc/cmd/sqlc@latest
+
+# Install migrate
+RUN go install -tags 'postgres' github.com/golang-migrate/migrate/v4/cmd/migrate@latest
+
+WORKDIR /app
+
+# Copy go mod files
+COPY go.mod go.sum ./
+RUN go mod download
+
+# Copy source code
+COPY . .
+
+EXPOSE 8080
+
+CMD ["air", "-c", ".air.toml"]

backend/docker/init-multiple-databases.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+set -e
+set -u
+
+# Script to create multiple databases in PostgreSQL container
+# Used by docker-compose to create both roadwave_dev and zitadel databases
+
+function create_database() {
+	local database=$1
+	echo "Creating database '$database'"
+	psql -v ON_ERROR_STOP=1 --username "$POSTGRES_USER" <<-EOSQL
+	    CREATE DATABASE $database;
+	    GRANT ALL PRIVILEGES ON DATABASE $database TO $POSTGRES_USER;
+EOSQL
+}
+
+if [ -n "$POSTGRES_MULTIPLE_DATABASES" ]; then
+	echo "Multiple database creation requested: $POSTGRES_MULTIPLE_DATABASES"
+	for db in $(echo $POSTGRES_MULTIPLE_DATABASES | tr ',' ' '); do
+		create_database $db
+	done
+	echo "Multiple databases created"
+fi