feat: add postgresql-mcp Docker image + CI build step

.woodpecker.yml

@@ -62,3 +62,15 @@ steps:
       - docker login forgejo.corentic.eu -u tobi -p $FORGEJO_REGISTRY_TOKEN
       - docker build -t forgejo.corentic.eu/corentic/mcp-fleet-github:latest -f github/Dockerfile github/
       - docker push forgejo.corentic.eu/corentic/mcp-fleet-github:latest
+
+  build-postgresql:
+    image: docker:latest
+    volumes:
+      - /var/run/docker.sock:/var/run/docker.sock
+    environment:
+      FORGEJO_REGISTRY_TOKEN:
+        from_secret: forgejo_registry_token
+    commands:
+      - docker login forgejo.corentic.eu -u tobi -p $FORGEJO_REGISTRY_TOKEN
+      - docker build -t forgejo.corentic.eu/corentic/mcp-fleet-postgresql:latest -f postgresql/Dockerfile postgresql/
+      - docker push forgejo.corentic.eu/corentic/mcp-fleet-postgresql:latest

postgresql/Dockerfile

@@ -0,0 +1,7 @@
+FROM node:22-slim
+
+RUN npm install -g mcp-proxy@6.5.2 mcp-postgres@1.3.0
+
+EXPOSE 8109
+
+CMD ["mcp-proxy", "--port", "8109", "--host", "0.0.0.0", "--", "mcp-postgres"]

postgresql/README.md

@@ -0,0 +1,39 @@
+# postgresql-mcp
+
+MCP server for PostgreSQL database operations.
+
+Source: [`mcp-postgres`](https://npm.im/mcp-postgres)
+
+## Environment Variables
+
+Uses standard PostgreSQL environment variables via `pg` module:
+
+| Variable | Required | Description |
+|----------|----------|-------------|
+| `PGHOST` | Yes | PostgreSQL host |
+| `PGPORT` | No | PostgreSQL port (default: `5432`) |
+| `PGUSER` | Yes | PostgreSQL user |
+| `PGPASSWORD` | Yes | PostgreSQL password |
+| `PGDATABASE` | Yes | PostgreSQL database name |
+
+## Usage
+
+```bash
+docker run -d \
+  --name postgresql-mcp \
+  -p 8109:8109 \
+  -e PGHOST=postgres.example.com \
+  -e PGPORT=5432 \
+  -e PGUSER=myuser \
+  -e PGPASSWORD=secret \
+  -e PGDATABASE=mydb \
+  forgejo.corentic.eu/corentic/mcp-fleet-postgresql:latest
+```
+
+## Tools
+
+- `query` — Execute read-only SQL queries (SELECT, EXPLAIN, etc.)
+- `execute` — Execute write SQL (INSERT, UPDATE, DELETE, DDL)
+- `list_tables` — List tables in the database
+- `describe_table` — Get schema info for a specific table
+- `get_table_stats` — Row counts and table statistics