doc(db): add deployement documentation

db/README.md

@@ -0,0 +1,22 @@
+= Deployement
+
+1. Create the Influx token offline with a influx3 container:
+
+```bash
+echo "apiv3_$(openssl rand -base64 64 | tr -d '+/=')" > secrets/admin-token.txt
+```
+
+2. Copy `.env.template` to `.env` and change value if necessary:
+
+```bash
+cp .env.template .env
+```
+
+3. Deploy the stack:
+
+```bash
+docker compose up -d
+```
+
+== Traefik
+A traefik config file is available on [traefik.yml](./traefik.yml). It can be used with an OIDC provider ([Authentik](https://github.com/goauthentik/authentik) in our case) to control access to the database explorer.