refactor: improve keycloak local config, and docker-compose.resources.yml

Author: JeromeBu

.env.sample

@@ -0,0 +1,21 @@
+DATABASE_URL=postgresql://catalogi:pg_password@localhost:5432/db
+API_PORT=3084
+EXTERNAL_SOFTWARE_DATA_ORIGIN=wikidata
+README_URL=https://git.sr.ht/~codegouvfr/logiciels-libres/blob/main/sill.md
+TERMS_OF_SERVICE_URL=https://code.gouv.fr/sill/tos_fr.md
+
+VITE_HEAD="
+  <title>Catalogi - Local use</title>
+
+  <script defer>
+    console.log('This is a custom code in head, used in local');
+  </script>
+"
+
+# The following variables are use to configure the docker-compose.ressources.yml
+
+# make sure it is aligned with DATABASE_URL, the following are the defaults:
+
+# POSTGRES_DB=db
+# POSTGRES_USER=catalogi
+# POSTGRES_PASSWORD=pg_password