Remove Prefect PostgreSQL backup worker Docker image

## What changed

Fixes the build failure caused by wrong upstream repo URL and missing default branch.

### Dockerfile
- **Repo URL**: `opsmill/infrahub-mcp` (was `opsmill/infrahub-mcp-server`)
- **Default branch**: clone without `--branch` when `INFRAHUB_MCP_VERSION` is unset, so the upstream default branch is used automatically
- **Secrets warning**: removed `ENV INFRAHUB_API_TOKEN=""` — the token should be passed at runtime via `-e`, not baked into the image
- **Comments**: rewritten in English

### README
- Fixed upstream repo link
- Clarified that `INFRAHUB_API_TOKEN` is required at runtime

Reviewed-on: #7

images/infrahub-mcp/Dockerfile

@@ -0,0 +1,37 @@
+FROM python:3.13-slim
+
+# System dependencies for uv and potential wheel builds
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends git ca-certificates curl && \
+    rm -rf /var/lib/apt/lists/*
+
+# Install uv
+COPY --from=ghcr.io/astral-sh/uv:latest /uv /usr/local/bin/uv
+
+# Clone the upstream MCP server repository
+# Use INFRAHUB_MCP_VERSION to pin a specific tag/branch at build time
+# When left empty, the repo's default branch is used
+ARG INFRAHUB_MCP_VERSION=""
+RUN if [ -n "${INFRAHUB_MCP_VERSION}" ]; then \
+      git clone --depth 1 --branch "${INFRAHUB_MCP_VERSION}" \
+        https://github.com/opsmill/infrahub-mcp.git /app; \
+    else \
+      git clone --depth 1 \
+        https://github.com/opsmill/infrahub-mcp.git /app; \
+    fi
+
+WORKDIR /app
+
+# Install Python dependencies via uv
+RUN uv sync --frozen --no-dev
+
+# Default environment variables
+# INFRAHUB_API_TOKEN should be passed at runtime (not baked into the image)
+ENV INFRAHUB_ADDRESS=http://localhost:8000
+ENV MCP_HOST=0.0.0.0
+ENV MCP_PORT=8001
+
+EXPOSE 8001
+
+# Run the MCP server in SSE mode (network-accessible)
+ENTRYPOINT ["uv", "run", "fastmcp", "run", "src/infrahub_mcp/server.py:mcp", "--transport", "sse"]

images/infrahub-mcp/README.md

@@ -0,0 +1,52 @@
+# infrahub-mcp
+
+Docker image for the Infrahub MCP server ([OpsMill](https://github.com/opsmill/infrahub-mcp)).
+
+Packages the infrahub-mcp server into a ready-to-use container,
+running in SSE mode on port 8001.
+
+## Environment variables
+
+| Variable             | Description                      | Default                  |
+|----------------------|----------------------------------|--------------------------|
+| `INFRAHUB_ADDRESS`   | Infrahub instance URL            | `http://localhost:8000`  |
+| `INFRAHUB_API_TOKEN` | Infrahub API token               | *(required at runtime)*  |
+| `MCP_HOST`           | Listen address                   | `0.0.0.0`                |
+| `MCP_PORT`           | Listen port                      | `8001`                   |
+
+## Build
+
+```bash
+docker build -t gitea.arnodo.fr/damien/infrahub-mcp:latest images/infrahub-mcp/
+```
+
+### Pin a specific upstream version
+
+```bash
+docker build --build-arg INFRAHUB_MCP_VERSION=v1.0.0 \
+  -t gitea.arnodo.fr/damien/infrahub-mcp:v1.0.0 images/infrahub-mcp/
+```
+
+## Usage
+
+```bash
+docker run -d --name infrahub-mcp \
+  -e INFRAHUB_ADDRESS=http://infrahub.local:8000 \
+  -e INFRAHUB_API_TOKEN=my-api-token \
+  -p 8001:8001 \
+  gitea.arnodo.fr/damien/infrahub-mcp:latest
+```
+
+## MCP client configuration (Claude Desktop, Cursor, etc.)
+
+Point your client to the container's SSE endpoint:
+
+```json
+{
+  "mcpServers": {
+    "infrahub_mcp": {
+      "url": "http://localhost:8001/sse"
+    }
+  }
+}
+```

images/prefect-worker-pg-backup/Dockerfile

@@ -1,35 +0,0 @@
-# =============================================================================
-# Prefect Worker - PostgreSQL Backup
-#
-# Image Docker pour un worker Prefect dédié aux sauvegardes PostgreSQL
-# Inclut les outils nécessaires pour dump PG et upload vers S3 (Garage)
-# =============================================================================
-
-FROM prefecthq/prefect:3-python3.12
-
-LABEL maintainer="Damien Arnodo"
-LABEL org.opencontainers.image.title="Prefect Worker - PostgreSQL Backup"
-LABEL org.opencontainers.image.description="Prefect worker with PostgreSQL and S3 tools for database backups"
-
-# Installation des outils système
-# - postgresql-client : pg_dump, pg_restore, psql
-# - git : nécessaire pour cloner les repositories contenant le code des flows
-RUN apt-get update && apt-get install -y --no-install-recommends \
-    postgresql-client \
-    git \
-    && rm -rf /var/lib/apt/lists/*
-
-# Installation des dépendances Python pour S3 et PostgreSQL
-RUN pip install --no-cache-dir \
-    boto3 \
-    psycopg2-binary \
-    prefect-aws
-
-# Création d'un utilisateur non-root
-RUN useradd -m -u 1000 prefect
-USER prefect
-
-WORKDIR /app
-
-# Le worker sera démarré via la commande dans docker-compose
-# CMD ["prefect", "worker", "start", "--pool", "my-pool"]

images/prefect-worker-pg-backup/README.md

@@ -1,38 +0,0 @@
-# Prefect Worker - PostgreSQL Backup
-
-Image Docker pour un worker Prefect dédié aux sauvegardes de bases de données PostgreSQL vers un stockage S3-compatible (Garage).
-
-## Contenu
-
-- **Base** : `prefecthq/prefect:3-python3.12`
-- **Outils PostgreSQL** : `pg_dump`, `pg_restore`, `psql`
-- **Python** : `boto3`, `psycopg2-binary`
-
-## Utilisation
-
-### Dans docker-compose
-
-```yaml
-prefect-worker:
-  image: gitea.arnodo.fr/damien/prefect-worker-pg-backup:latest
-  environment:
-    - PREFECT_API_URL=http://prefect-server:4200/api
-  command: prefect worker start --pool pg-backup-pool --type process
-  depends_on:
-    - prefect-server
-```
-
-### Variables d'environnement requises pour les flows
-
-| Variable | Description |
-|----------|-------------|
-| `PREFECT_API_URL` | URL de l'API Prefect |
-| `AWS_ACCESS_KEY_ID` | Clé d'accès S3 (Garage) |
-| `AWS_SECRET_ACCESS_KEY` | Secret S3 (Garage) |
-| `AWS_ENDPOINT_URL` | Endpoint S3 (ex: `https://s3.garage.example.com`) |
-
-## Build local
-
-```bash
-docker build -t prefect-worker-pg-backup:latest images/prefect-worker-pg-backup/
-```