diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b98c8a990c..a27cb8db8c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -36,8 +36,8 @@ jobs:
         image: postgis/postgis:15-master
         env:
           POSTGRES_PASSWORD: password
-        ports:
-          - 5432:5432
+        volumes:
+          - /var/run/postgresql:/var/run/postgresql
         # Set health checks to wait until postgres has started
         options: >-
           --health-cmd pg_isready
@@ -46,6 +46,10 @@ jobs:
           --health-retries 5
 
     steps:
+    - name: Setup PostgreSQL environment
+      run: |
+        echo PGHOST=/var/run/postgresql >> $GITHUB_ENV
+        echo PGUSER=postgres >> $GITHUB_ENV
     - name: 🐘 Non-durable PostgreSQL
       run: |
         psql <<SQL
@@ -54,10 +58,6 @@ jobs:
           ALTER SYSTEM SET full_page_writes=off;
         SQL
         docker kill --signal=SIGHUP ${{ job.services.postgres.id }}
-      env:
-        PGPASSWORD: password
-        PGHOST: localhost
-        PGUSER: postgres
     - uses: actions/checkout@v4.2.2
     - name: 🌍 Install spatial libraries
       run: sudo apt-get update && sudo apt-get install binutils build-essential libproj-dev gdal-bin
@@ -66,10 +66,6 @@ jobs:
         psql <<SQL
             CREATE DATABASE itou;
         SQL
-      env:
-        PGPASSWORD: password
-        PGHOST: localhost
-        PGUSER: postgres
     - name: 💂 Install Python
       uses: actions/setup-python@v5
       with:
diff --git a/.gitignore b/.gitignore
index 4e1c849bb2..00b83f0206 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,6 +5,7 @@ envs/secrets.env
 
 # Config
 docker-compose-prod.yml
+docker/dev/postgres/
 docker/prod/
 
 # Project specific
diff --git a/docker-compose.yml b/docker-compose.yml
index 645625b20e..cbe52dcfbf 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -36,6 +36,9 @@ services:
     shm_size: 1g
     volumes:
       - postgres_data:/var/lib/postgresql/data
+      - type: bind
+        source: ${PWD}/docker/dev/postgres
+        target: /var/run/postgresql/
     restart: unless-stopped
     ports:
       - "127.0.0.1:${POSTGRES_PORT_ON_DOCKER_HOST:-5432}:5432"
diff --git a/docs/environment.md b/docs/environment.md
index b2d4f0cd80..8f19730697 100644
--- a/docs/environment.md
+++ b/docs/environment.md
@@ -27,6 +27,22 @@ arguments pour se connecter à la base de données.
 Les variables suivantes permet d’accéder à la base de données définie dans le
 [docker-compose.yml](../docker-compose.yml) simplement avec la commande `psql`.
 
+Deux options:
+
+#### Socket UNIX
+
+La plus performante, et devrait bien fonctionner sur les systèmes
+[*nix](https://fr.wikipedia.org/wiki/Type_Unix).
+
+```bash
+export PGDATABASE=itou
+export PGHOST="${PWD}/docker/dev/postgres"
+export PGUSER=postgres
+# La connexion par la socket est autorisée par défaut.
+```
+
+#### TCP
+
 ```bash
 export PGDATABASE=itou
 export PGHOST=localhost